76172745 has 16 divisors (see below), whose sum is σ = 132956352. Its totient is φ = 36932160.

The previous prime is 76172741. The next prime is 76172749. The reversal of 76172745 is 54727167.

It is an interprime number because it is at equal distance from previous prime (76172741) and next prime (76172749).

It is not a de Polignac number, because 76172745 - 2² = 76172741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76172741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230662 + ... + 230991.

It is an arithmetic number, because the mean of its divisors is an integer number (8309772).

Almost surely, 2^76172745 is an apocalyptic number.

It is an amenable number.

76172745 is a deficient number, since it is larger than the sum of its proper divisors (56783607).

76172745 is a wasteful number, since it uses less digits than its factorization.

76172745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461672.

The product of its digits is 82320, while the sum is 39.

The square root of 76172745 is about 8727.6998688085. The cubic root of 76172745 is about 423.9030442395.

The spelling of 76172745 in words is "seventy-six million, one hundred seventy-two thousand, seven hundred forty-five".