76721053 has 2 divisors, whose sum is σ = 76721054. Its totient is φ = 76721052.

The previous prime is 76721041. The next prime is 76721089. The reversal of 76721053 is 35012767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43520409 + 33200644 = 6597^2 + 5762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76721053 is a prime.

It is a super-2 number, since 2×76721053² = 11772239946857618, which contains 22 as substring.

It is equal to p_4489141 and since 76721053 and 4489141 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76721093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38360526 + 38360527.

It is an arithmetic number, because the mean of its divisors is an integer number (38360527).

Almost surely, 2^76721053 is an apocalyptic number.

It is an amenable number.

76721053 is a deficient number, since it is larger than the sum of its proper divisors (1).

76721053 is an equidigital number, since it uses as much as digits as its factorization.

76721053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 76721053 is about 8759.0554856103. The cubic root of 76721053 is about 424.9177289424.

The spelling of 76721053 in words is "seventy-six million, seven hundred twenty-one thousand, fifty-three".