76387645 has 4 divisors (see below), whose sum is σ = 91665180. Its totient is φ = 61110112.

The previous prime is 76387603. The next prime is 76387667. The reversal of 76387645 is 54678367.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9622404 + 66765241 = 3102^2 + 8171^2 .

It is a cyclic number.

It is not a de Polignac number, because 76387645 - 2⁷ = 76387517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76387595 and 76387604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7638760 + ... + 7638769.

It is an arithmetic number, because the mean of its divisors is an integer number (22916295).

Almost surely, 2^76387645 is an apocalyptic number.

It is an amenable number.

76387645 is a deficient number, since it is larger than the sum of its proper divisors (15277535).

76387645 is a wasteful number, since it uses less digits than its factorization.

76387645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15277534.

The product of its digits is 846720, while the sum is 46.

The square root of 76387645 is about 8740.0025743703. The cubic root of 76387645 is about 424.3013110572.

The spelling of 76387645 in words is "seventy-six million, three hundred eighty-seven thousand, six hundred forty-five".