76873221 has 24 divisors (see below), whose sum is σ = 118067040. Its totient is φ = 48060000.

The previous prime is 76873219. The next prime is 76873249. The reversal of 76873221 is 12237867.

76873221 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 76873221 - 2¹ = 76873219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76873261) 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 23 ways as a sum of consecutive naturals, for example, 15046 + ... + 19496.

It is an arithmetic number, because the mean of its divisors is an integer number (4919460).

Almost surely, 2^76873221 is an apocalyptic number.

It is an amenable number.

76873221 is a deficient number, since it is larger than the sum of its proper divisors (41193819).

76873221 is a wasteful number, since it uses less digits than its factorization.

76873221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4577 (or 4574 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 76873221 is about 8767.7375074759. The cubic root of 76873221 is about 425.1984697018.

The spelling of 76873221 in words is "seventy-six million, eight hundred seventy-three thousand, two hundred twenty-one".