797611861 has 4 divisors (see below), whose sum is σ = 801392224. Its totient is φ = 793831500.

The previous prime is 797611819. The next prime is 797611883. The reversal of 797611861 is 168116797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 797611861 - 2²⁵ = 764057429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797641861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1889865 + ... + 1890286.

It is an arithmetic number, because the mean of its divisors is an integer number (200348056).

Almost surely, 2^797611861 is an apocalyptic number.

It is an amenable number.

797611861 is a deficient number, since it is larger than the sum of its proper divisors (3780363).

797611861 is a wasteful number, since it uses less digits than its factorization.

797611861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780362.

The product of its digits is 127008, while the sum is 46.

The square root of 797611861 is about 28242.0229622455. The cubic root of 797611861 is about 927.3931160874.

The spelling of 797611861 in words is "seven hundred ninety-seven million, six hundred eleven thousand, eight hundred sixty-one".