137531391 has 8 divisors (see below), whose sum is σ = 183555840. Its totient is φ = 91597272.

The previous prime is 137531363. The next prime is 137531437. The reversal of 137531391 is 193135731.

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

It is not a de Polignac number, because 137531391 - 2⁶ = 137531327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137531341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18945 + ... + 25178.

It is an arithmetic number, because the mean of its divisors is an integer number (22944480).

Almost surely, 2^137531391 is an apocalyptic number.

137531391 is a deficient number, since it is larger than the sum of its proper divisors (46024449).

137531391 is a wasteful number, since it uses less digits than its factorization.

137531391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45165.

The product of its digits is 8505, while the sum is 33.

The square root of 137531391 is about 11727.3778399095. The cubic root of 137531391 is about 516.1793326851.

The spelling of 137531391 in words is "one hundred thirty-seven million, five hundred thirty-one thousand, three hundred ninety-one".