137432591 has 4 divisors (see below), whose sum is σ = 138766992. Its totient is φ = 136098192.

The previous prime is 137432563. The next prime is 137432597. The reversal of 137432591 is 195234731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137432591 - 2⁶ = 137432527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137432597) 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 3 ways as a sum of consecutive naturals, for example, 667046 + ... + 667251.

It is an arithmetic number, because the mean of its divisors is an integer number (34691748).

Almost surely, 2^137432591 is an apocalyptic number.

137432591 is a deficient number, since it is larger than the sum of its proper divisors (1334401).

137432591 is a wasteful number, since it uses less digits than its factorization.

137432591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334400.

The product of its digits is 22680, while the sum is 35.

The square root of 137432591 is about 11723.1647177714. The cubic root of 137432591 is about 516.0556985225.

The spelling of 137432591 in words is "one hundred thirty-seven million, four hundred thirty-two thousand, five hundred ninety-one".