864137507 has 4 divisors (see below), whose sum is σ = 866088600. Its totient is φ = 862186416.

The previous prime is 864137497. The next prime is 864137509. The reversal of 864137507 is 705731468.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864137507 is a prime.

It is a super-4 number, since 4×864137507⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864137509) 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 3 ways as a sum of consecutive naturals, for example, 974882 + ... + 975767.

It is an arithmetic number, because the mean of its divisors is an integer number (216522150).

Almost surely, 2^864137507 is an apocalyptic number.

864137507 is a deficient number, since it is larger than the sum of its proper divisors (1951093).

864137507 is a wasteful number, since it uses less digits than its factorization.

864137507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951092.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 864137507 is about 29396.2158619098. The cubic root of 864137507 is about 952.4911559906.

The spelling of 864137507 in words is "eight hundred sixty-four million, one hundred thirty-seven thousand, five hundred seven".