137166491 has 64 divisors (see below), whose sum is σ = 192844800. Its totient is φ = 94348800.

The previous prime is 137166481. The next prime is 137166499. The reversal of 137166491 is 194661731.

It is a happy number.

It is not a de Polignac number, because 137166491 - 2⁶ = 137166427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137166499) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2248601 + ... + 2248661.

It is an arithmetic number, because the mean of its divisors is an integer number (3013200).

Almost surely, 2^137166491 is an apocalyptic number.

137166491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

137166491 is a deficient number, since it is larger than the sum of its proper divisors (55678309).

137166491 is a wasteful number, since it uses less digits than its factorization.

137166491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its digits is 27216, while the sum is 38.

The square root of 137166491 is about 11711.8098942905. The cubic root of 137166491 is about 515.7224172032.

The spelling of 137166491 in words is "one hundred thirty-seven million, one hundred sixty-six thousand, four hundred ninety-one".