77687053 has 2 divisors, whose sum is σ = 77687054. Its totient is φ = 77687052.

The previous prime is 77687047. The next prime is 77687089. The reversal of 77687053 is 35078677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71199844 + 6487209 = 8438^2 + 2547^2 .

It is a cyclic number.

It is not a de Polignac number, because 77687053 - 2⁵ = 77687021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77687003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38843526 + 38843527.

It is an arithmetic number, because the mean of its divisors is an integer number (38843527).

Almost surely, 2^77687053 is an apocalyptic number.

It is an amenable number.

77687053 is a deficient number, since it is larger than the sum of its proper divisors (1).

77687053 is an equidigital number, since it uses as much as digits as its factorization.

77687053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 77687053 is about 8814.0259246272. The cubic root of 77687053 is about 426.6936852872.

The spelling of 77687053 in words is "seventy-seven million, six hundred eighty-seven thousand, fifty-three".