76959621 has 6 divisors (see below), whose sum is σ = 111163910. Its totient is φ = 51306408.

The previous prime is 76959601. The next prime is 76959647. The reversal of 76959621 is 12695967.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 35820225 = 6414^2 + 5985^2 .

It is a de Polignac number, because none of the positive numbers 2^k-76959621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76959601) 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 5 ways as a sum of consecutive naturals, for example, 4275526 + ... + 4275543.

Almost surely, 2^76959621 is an apocalyptic number.

It is an amenable number.

76959621 is a deficient number, since it is larger than the sum of its proper divisors (34204289).

76959621 is a wasteful number, since it uses less digits than its factorization.

76959621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551075 (or 8551072 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 76959621 is about 8772.6632786173. The cubic root of 76959621 is about 425.3577076114.

The spelling of 76959621 in words is "seventy-six million, nine hundred fifty-nine thousand, six hundred twenty-one".