860979561 has 16 divisors (see below), whose sum is σ = 1237131840. Its totient is φ = 529467840.

The previous prime is 860979551. The next prime is 860979571. The reversal of 860979561 is 165979068.

It is an interprime number because it is at equal distance from previous prime (860979551) and next prime (860979571).

It is not a de Polignac number, because 860979561 - 2¹⁴ = 860963177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (860979551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56410 + ... + 70028.

It is an arithmetic number, because the mean of its divisors is an integer number (77320740).

Almost surely, 2^860979561 is an apocalyptic number.

It is an amenable number.

860979561 is a deficient number, since it is larger than the sum of its proper divisors (376152279).

860979561 is a wasteful number, since it uses less digits than its factorization.

860979561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15256.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 860979561 is about 29342.4532205472. The cubic root of 860979561 is about 951.3294631042.

The spelling of 860979561 in words is "eight hundred sixty million, nine hundred seventy-nine thousand, five hundred sixty-one".