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1001011001 = 10720994457
BaseRepresentation
bin111011101010100…
…011011100111001
32120202120121221112
4323222203130321
54022224323001
6243155050105
733543311264
oct7352433471
92522517845
101001011001
11474054421
1223b2a0935
1312c502403
1496d31cdb
155cd30cbb
hex3baa3739

1001011001 has 8 divisors (see below), whose sum is σ = 1011074400. Its totient is φ = 990960928.

The previous prime is 1001010979. The next prime is 1001011003. The reversal of 1001011001 is 1001101001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001011001 - 26 = 1001010937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001011003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222365 + ... + 226821.

It is an arithmetic number, because the mean of its divisors is an integer number (126384300).

Almost surely, 21001011001 is an apocalyptic number.

It is an amenable number.

1001011001 is a deficient number, since it is larger than the sum of its proper divisors (10063399).

1001011001 is a wasteful number, since it uses less digits than its factorization.

1001011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663.

The product of its (nonzero) digits is 1, while the sum is 5.

The square root of 1001011001 is about 31638.7578928124. The cubic root of 1001011001 is about 1000.3368868279.

Adding to 1001011001 its reverse (1001101001), we get a palindrome (2002112002).

Subtracting 1001011001 from its reverse (1001101001), we obtain a square (90000 = 3002).

It can be divided in two parts, 100 and 1011001, that added together give a palindrome (1011101).

The spelling of 1001011001 in words is "one billion, one million, eleven thousand, one".

Divisors: 1 107 2099 4457 224593 476899 9355243 1001011001