136777687 has 2 divisors, whose sum is σ = 136777688. Its totient is φ = 136777686.

The previous prime is 136777651. The next prime is 136777721. The reversal of 136777687 is 786777631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136777687 - 2⁷ = 136777559 is a prime.

It is a super-2 number, since 2×136777687² = 37416271322139938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136777187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68388843 + 68388844.

It is an arithmetic number, because the mean of its divisors is an integer number (68388844).

Almost surely, 2^136777687 is an apocalyptic number.

136777687 is a deficient number, since it is larger than the sum of its proper divisors (1).

136777687 is an equidigital number, since it uses as much as digits as its factorization.

136777687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2074464, while the sum is 52.

The square root of 136777687 is about 11695.1993142486. The cubic root of 136777687 is about 515.2346773476.

The spelling of 136777687 in words is "one hundred thirty-six million, seven hundred seventy-seven thousand, six hundred eighty-seven".