865799361 has 80 divisors (see below), whose sum is σ = 1540560384. Its totient is φ = 474304896.

The previous prime is 865799339. The next prime is 865799377. The reversal of 865799361 is 163997568.

865799361 is a `hidden beast` number, since 8 + 6 + 579 + 9 + 3 + 61 = 666.

It is not a de Polignac number, because 865799361 - 2¹⁰ = 865798337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865799298 and 865799307.

It is not an unprimeable number, because it can be changed into a prime (865799161) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1412091 + ... + 1412703.

Almost surely, 2^865799361 is an apocalyptic number.

865799361 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

865799361 is a deficient number, since it is larger than the sum of its proper divisors (674761023).

865799361 is a wasteful number, since it uses less digits than its factorization.

865799361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 723 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 865799361 is about 29424.4687462663. The cubic root of 865799361 is about 953.1013550218.

The spelling of 865799361 in words is "eight hundred sixty-five million, seven hundred ninety-nine thousand, three hundred sixty-one".