136816591 has 2 divisors, whose sum is σ = 136816592. Its totient is φ = 136816590.

The previous prime is 136816579. The next prime is 136816597. The reversal of 136816591 is 195618631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136816591 - 2¹¹ = 136814543 is a prime.

It is a super-2 number, since 2×136816591² = 37437559145722562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136816597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68408295 + 68408296.

It is an arithmetic number, because the mean of its divisors is an integer number (68408296).

Almost surely, 2^136816591 is an apocalyptic number.

136816591 is a deficient number, since it is larger than the sum of its proper divisors (1).

136816591 is an equidigital number, since it uses as much as digits as its factorization.

136816591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 136816591 is about 11696.8624425527. The cubic root of 136816591 is about 515.2835225216.

The spelling of 136816591 in words is "one hundred thirty-six million, eight hundred sixteen thousand, five hundred ninety-one".