76521973 has 12 divisors (see below), whose sum is σ = 85375360. Its totient is φ = 68519880.

The previous prime is 76521971. The next prime is 76522003. The reversal of 76521973 is 37912567.

It is not a de Polignac number, because 76521973 - 2¹ = 76521971 is a prime.

It is a super-2 number, since 2×76521973² = 11711224703625458, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76521971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3388 + ... + 12826.

Almost surely, 2^76521973 is an apocalyptic number.

It is an amenable number.

76521973 is a deficient number, since it is larger than the sum of its proper divisors (8853387).

76521973 is a wasteful number, since it uses less digits than its factorization.

76521973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528 (or 9517 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 76521973 is about 8747.6838648868. The cubic root of 76521973 is about 424.5498773017.

The spelling of 76521973 in words is "seventy-six million, five hundred twenty-one thousand, nine hundred seventy-three".