1001022009 has 32 divisors (see below), whose sum is σ = 1473650304. Its totient is φ = 600652800.

The previous prime is 1001022007. The next prime is 1001022047. The reversal of 1001022009 is 9002201001.

It is a happy number.

It is not a de Polignac number, because 1001022009 - 2¹ = 1001022007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001022007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262017 + ... + 265809.

It is an arithmetic number, because the mean of its divisors is an integer number (46051572).

Almost surely, 2^1001022009 is an apocalyptic number.

It is an amenable number.

1001022009 is a deficient number, since it is larger than the sum of its proper divisors (472628295).

1001022009 is a wasteful number, since it uses less digits than its factorization.

1001022009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1001022009 is about 31638.9318561800. The cubic root of 1001022009 is about 1000.3405536767.

The spelling of 1001022009 in words is "one billion, one million, twenty-two thousand, nine".