1000061651 has 4 divisors (see below), whose sum is σ = 1000133904. Its totient is φ = 999989400.

The previous prime is 1000061617. The next prime is 1000061653. The reversal of 1000061651 is 1561600001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000061651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000061653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8135 + ... + 45456.

It is an arithmetic number, because the mean of its divisors is an integer number (250033476).

Almost surely, 2^1000061651 is an apocalyptic number.

1000061651 is a deficient number, since it is larger than the sum of its proper divisors (72253).

1000061651 is an equidigital number, since it uses as much as digits as its factorization.

1000061651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72252.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1000061651 is about 31623.7513745602. The cubic root of 1000061651 is about 1000.0205499110.

Adding to 1000061651 its reverse (1561600001), we get a palindrome (2561661652).

The spelling of 1000061651 in words is "one billion, sixty-one thousand, six hundred fifty-one".