136427491 has 2 divisors, whose sum is σ = 136427492. Its totient is φ = 136427490.

The previous prime is 136427471. The next prime is 136427503. The reversal of 136427491 is 194724631.

136427491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (194724631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136427491 - 2¹⁹ = 135903203 is a prime.

It is a super-2 number, since 2×136427491² = 37224920601110162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136427491.

It is not a weakly prime, because it can be changed into another prime (136427471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68213745 + 68213746.

It is an arithmetic number, because the mean of its divisors is an integer number (68213746).

Almost surely, 2^136427491 is an apocalyptic number.

136427491 is a deficient number, since it is larger than the sum of its proper divisors (1).

136427491 is an equidigital number, since it uses as much as digits as its factorization.

136427491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 136427491 is about 11680.2179346106. The cubic root of 136427491 is about 514.7945779526.

The spelling of 136427491 in words is "one hundred thirty-six million, four hundred twenty-seven thousand, four hundred ninety-one".