136488491 has 2 divisors, whose sum is σ = 136488492. Its totient is φ = 136488490.

The previous prime is 136488479. The next prime is 136488497. The reversal of 136488491 is 194884631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136488491 is a prime.

It is not a weakly prime, because it can be changed into another prime (136488497) 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, 68244245 + 68244246.

It is an arithmetic number, because the mean of its divisors is an integer number (68244246).

Almost surely, 2^136488491 is an apocalyptic number.

136488491 is a deficient number, since it is larger than the sum of its proper divisors (1).

136488491 is an equidigital number, since it uses as much as digits as its factorization.

136488491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 136488491 is about 11682.8288954345. The cubic root of 136488491 is about 514.8712921835.

The spelling of 136488491 in words is "one hundred thirty-six million, four hundred eighty-eight thousand, four hundred ninety-one".