76322921 has 4 divisors (see below), whose sum is σ = 76348500. Its totient is φ = 76297344.

The previous prime is 76322903. The next prime is 76322951. The reversal of 76322921 is 12922367.

It is a happy number.

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 33223696 + 43099225 = 5764^2 + 6565^2 .

It is a cyclic number.

It is not a de Polignac number, because 76322921 - 2¹⁰ = 76321897 is a prime.

It is a super-3 number, since 3×76322921³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76322951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7616 + ... + 14513.

It is an arithmetic number, because the mean of its divisors is an integer number (19087125).

Almost surely, 2^76322921 is an apocalyptic number.

It is an amenable number.

76322921 is a deficient number, since it is larger than the sum of its proper divisors (25579).

76322921 is a wasteful number, since it uses less digits than its factorization.

76322921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25578.

The product of its digits is 9072, while the sum is 32.

The square root of 76322921 is about 8736.2990447901. The cubic root of 76322921 is about 424.1814389753.

The spelling of 76322921 in words is "seventy-six million, three hundred twenty-two thousand, nine hundred twenty-one".