76713421 has 2 divisors, whose sum is σ = 76713422. Its totient is φ = 76713420.

The previous prime is 76713389. The next prime is 76713449. The reversal of 76713421 is 12431767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 12152196 = 8035^2 + 3486^2 .

It is an emirp because it is prime and its reverse (12431767) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76713421 - 2⁵ = 76713389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76713491) 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, 38356710 + 38356711.

It is an arithmetic number, because the mean of its divisors is an integer number (38356711).

Almost surely, 2^76713421 is an apocalyptic number.

It is an amenable number.

76713421 is a deficient number, since it is larger than the sum of its proper divisors (1).

76713421 is an equidigital number, since it uses as much as digits as its factorization.

76713421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 76713421 is about 8758.6198113630. The cubic root of 76713421 is about 424.9036385917.

The spelling of 76713421 in words is "seventy-six million, seven hundred thirteen thousand, four hundred twenty-one".