768637137 has 4 divisors (see below), whose sum is σ = 1024849520. Its totient is φ = 512424756.

The previous prime is 768637123. The next prime is 768637139. The reversal of 768637137 is 731736867.

It is a happy number.

768637137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 731736867 = 3 ⋅243912289.

It is not a de Polignac number, because 768637137 - 2²⁰ = 767588561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768637139) 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, 128106187 + ... + 128106192.

It is an arithmetic number, because the mean of its divisors is an integer number (256212380).

Almost surely, 2^768637137 is an apocalyptic number.

It is an amenable number.

768637137 is a deficient number, since it is larger than the sum of its proper divisors (256212383).

768637137 is a wasteful number, since it uses less digits than its factorization.

768637137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256212382.

The product of its digits is 889056, while the sum is 48.

The square root of 768637137 is about 27724.3058885159. The cubic root of 768637137 is about 916.0245670299.

The spelling of 768637137 in words is "seven hundred sixty-eight million, six hundred thirty-seven thousand, one hundred thirty-seven".