76173221 has 2 divisors, whose sum is σ = 76173222. Its totient is φ = 76173220.

The previous prime is 76173211. The next prime is 76173241. The reversal of 76173221 is 12237167.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 10336225 = 8114^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 76173221 - 2⁶ = 76173157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76173211) 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 as a sum of consecutive naturals, namely, 38086610 + 38086611.

It is an arithmetic number, because the mean of its divisors is an integer number (38086611).

Almost surely, 2^76173221 is an apocalyptic number.

It is an amenable number.

76173221 is a deficient number, since it is larger than the sum of its proper divisors (1).

76173221 is an equidigital number, since it uses as much as digits as its factorization.

76173221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 76173221 is about 8727.7271382646. The cubic root of 76173221 is about 423.9039272212.

The spelling of 76173221 in words is "seventy-six million, one hundred seventy-three thousand, two hundred twenty-one".