77900051 has 2 divisors, whose sum is σ = 77900052. Its totient is φ = 77900050.

The previous prime is 77899999. The next prime is 77900077. The reversal of 77900051 is 15000977.

It is a strong prime.

It is an emirp because it is prime and its reverse (15000977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77900051 - 2¹⁰ = 77899027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77899987 and 77900023.

It is not a weakly prime, because it can be changed into another prime (77900951) 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, 38950025 + 38950026.

It is an arithmetic number, because the mean of its divisors is an integer number (38950026).

Almost surely, 2^77900051 is an apocalyptic number.

77900051 is a deficient number, since it is larger than the sum of its proper divisors (1).

77900051 is an equidigital number, since it uses as much as digits as its factorization.

77900051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2205, while the sum is 29.

The square root of 77900051 is about 8826.1005546051. The cubic root of 77900051 is about 427.0832910336.

The spelling of 77900051 in words is "seventy-seven million, nine hundred thousand, fifty-one".