77090137 has 2 divisors, whose sum is σ = 77090138. Its totient is φ = 77090136.

The previous prime is 77090119. The next prime is 77090159. The reversal of 77090137 is 73109077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75968656 + 1121481 = 8716^2 + 1059^2 .

It is a cyclic number.

It is not a de Polignac number, because 77090137 - 2⁷ = 77090009 is a prime.

It is not a weakly prime, because it can be changed into another prime (77090107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38545068 + 38545069.

It is an arithmetic number, because the mean of its divisors is an integer number (38545069).

Almost surely, 2^77090137 is an apocalyptic number.

It is an amenable number.

77090137 is a deficient number, since it is larger than the sum of its proper divisors (1).

77090137 is an equidigital number, since it uses as much as digits as its factorization.

77090137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9261, while the sum is 34.

The square root of 77090137 is about 8780.0989174382. The cubic root of 77090137 is about 425.5980268514.

The spelling of 77090137 in words is "seventy-seven million, ninety thousand, one hundred thirty-seven".