137017991 has 8 divisors (see below), whose sum is σ = 149606400. Its totient is φ = 124451640.

The previous prime is 137017981. The next prime is 137018033. The reversal of 137017991 is 199710731.

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

It is a cyclic number.

It is not a de Polignac number, because 137017991 - 2⁶ = 137017927 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 (137017901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9200 + ... + 18938.

It is an arithmetic number, because the mean of its divisors is an integer number (18700800).

Almost surely, 2^137017991 is an apocalyptic number.

137017991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

137017991 is a deficient number, since it is larger than the sum of its proper divisors (12588409).

137017991 is a wasteful number, since it uses less digits than its factorization.

137017991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11029.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 137017991 is about 11705.4684229210. The cubic root of 137017991 is about 515.5362385124.

The spelling of 137017991 in words is "one hundred thirty-seven million, seventeen thousand, nine hundred ninety-one".