797617905 has 64 divisors (see below), whose sum is σ = 1495646208. Its totient is φ = 355461120.

The previous prime is 797617903. The next prime is 797617921. The reversal of 797617905 is 509716797.

It is not a de Polignac number, because 797617905 - 2¹ = 797617903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (797617903) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 722584 + ... + 723686.

It is an arithmetic number, because the mean of its divisors is an integer number (23369472).

Almost surely, 2^797617905 is an apocalyptic number.

It is an amenable number.

797617905 is a deficient number, since it is larger than the sum of its proper divisors (698028303).

797617905 is a wasteful number, since it uses less digits than its factorization.

797617905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286.

The product of its (nonzero) digits is 833490, while the sum is 51.

The square root of 797617905 is about 28242.1299657090. The cubic root of 797617905 is about 927.3954585592.

The spelling of 797617905 in words is "seven hundred ninety-seven million, six hundred seventeen thousand, nine hundred five".