77136061 has 2 divisors, whose sum is σ = 77136062. Its totient is φ = 77136060.

The previous prime is 77136053. The next prime is 77136097. The reversal of 77136061 is 16063177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55800900 + 21335161 = 7470^2 + 4619^2 .

It is a cyclic number.

It is not a de Polignac number, because 77136061 - 2³ = 77136053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77136011) 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, 38568030 + 38568031.

It is an arithmetic number, because the mean of its divisors is an integer number (38568031).

Almost surely, 2^77136061 is an apocalyptic number.

It is an amenable number.

77136061 is a deficient number, since it is larger than the sum of its proper divisors (1).

77136061 is an equidigital number, since it uses as much as digits as its factorization.

77136061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 77136061 is about 8782.7137605640. The cubic root of 77136061 is about 425.6825222429.

The spelling of 77136061 in words is "seventy-seven million, one hundred thirty-six thousand, sixty-one".