864735131 has 4 divisors (see below), whose sum is σ = 931253232. Its totient is φ = 798217032.

The previous prime is 864735127. The next prime is 864735139. The reversal of 864735131 is 131537468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 864735131 - 2² = 864735127 is a prime.

It is a super-2 number, since 2×864735131² = 1495533693571174322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (864735139) 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, 33259031 + ... + 33259056.

It is an arithmetic number, because the mean of its divisors is an integer number (232813308).

Almost surely, 2^864735131 is an apocalyptic number.

864735131 is a deficient number, since it is larger than the sum of its proper divisors (66518101).

864735131 is a wasteful number, since it uses less digits than its factorization.

864735131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66518100.

The product of its digits is 60480, while the sum is 38.

The square root of 864735131 is about 29406.3790868580. The cubic root of 864735131 is about 952.7106813927.

The spelling of 864735131 in words is "eight hundred sixty-four million, seven hundred thirty-five thousand, one hundred thirty-one".