76893721 has 2 divisors, whose sum is σ = 76893722. Its totient is φ = 76893720.

The previous prime is 76893673. The next prime is 76893727. The reversal of 76893721 is 12739867.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 10634121 = 8140^2 + 3261^2 .

It is a cyclic number.

It is not a de Polignac number, because 76893721 - 2¹⁷ = 76762649 is a prime.

It is not a weakly prime, because it can be changed into another prime (76893727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38446860 + 38446861.

It is an arithmetic number, because the mean of its divisors is an integer number (38446861).

Almost surely, 2^76893721 is an apocalyptic number.

It is an amenable number.

76893721 is a deficient number, since it is larger than the sum of its proper divisors (1).

76893721 is an equidigital number, since it uses as much as digits as its factorization.

76893721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 76893721 is about 8768.9064882686. The cubic root of 76893721 is about 425.2362626367.

The spelling of 76893721 in words is "seventy-six million, eight hundred ninety-three thousand, seven hundred twenty-one".