136590491 has 8 divisors (see below), whose sum is σ = 142692000. Its totient is φ = 130502592.

The previous prime is 136590479. The next prime is 136590497. The reversal of 136590491 is 194095631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136590491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136590497) 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 in 7 ways as a sum of consecutive naturals, for example, 20885 + ... + 26633.

It is an arithmetic number, because the mean of its divisors is an integer number (17836500).

Almost surely, 2^136590491 is an apocalyptic number.

136590491 is a deficient number, since it is larger than the sum of its proper divisors (6101509).

136590491 is a wasteful number, since it uses less digits than its factorization.

136590491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6805.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 136590491 is about 11687.1934612207. The cubic root of 136590491 is about 514.9995173904. Note that the first 3 decimals are identical.

The spelling of 136590491 in words is "one hundred thirty-six million, five hundred ninety thousand, four hundred ninety-one".