76068721 has 2 divisors, whose sum is σ = 76068722. Its totient is φ = 76068720.

The previous prime is 76068719. The next prime is 76068731. The reversal of 76068721 is 12786067.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 30371121 = 6760^2 + 5511^2 .

It is a cyclic number.

It is not a de Polignac number, because 76068721 - 2¹ = 76068719 is a prime.

Together with 76068719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76068731) 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, 38034360 + 38034361.

It is an arithmetic number, because the mean of its divisors is an integer number (38034361).

Almost surely, 2^76068721 is an apocalyptic number.

It is an amenable number.

76068721 is a deficient number, since it is larger than the sum of its proper divisors (1).

76068721 is an equidigital number, since it uses as much as digits as its factorization.

76068721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 76068721 is about 8721.7384161645. The cubic root of 76068721 is about 423.7099910306.

The spelling of 76068721 in words is "seventy-six million, sixty-eight thousand, seven hundred twenty-one".