76561129 has 2 divisors, whose sum is σ = 76561130. Its totient is φ = 76561128.

The previous prime is 76561099. The next prime is 76561171. The reversal of 76561129 is 92116567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 522729 = 8720^2 + 723^2 .

It is a cyclic number.

It is not a de Polignac number, because 76561129 - 2¹³ = 76552937 is a prime.

It is not a weakly prime, because it can be changed into another prime (76561729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38280564 + 38280565.

It is an arithmetic number, because the mean of its divisors is an integer number (38280565).

Almost surely, 2^76561129 is an apocalyptic number.

It is an amenable number.

76561129 is a deficient number, since it is larger than the sum of its proper divisors (1).

76561129 is an equidigital number, since it uses as much as digits as its factorization.

76561129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 76561129 is about 8749.9216567921. The cubic root of 76561129 is about 424.6222784685.

The spelling of 76561129 in words is "seventy-six million, five hundred sixty-one thousand, one hundred twenty-nine".