137887031 has 4 divisors (see below), whose sum is σ = 138057864. Its totient is φ = 137716200.

The previous prime is 137887019. The next prime is 137887097. The reversal of 137887031 is 130788731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130788731 = 379 ⋅345089.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137887031 is a prime.

It is a super-2 number, since 2×137887031² = 38025666635989922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137887531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84200 + ... + 85821.

It is an arithmetic number, because the mean of its divisors is an integer number (34514466).

Almost surely, 2^137887031 is an apocalyptic number.

137887031 is a deficient number, since it is larger than the sum of its proper divisors (170833).

137887031 is an equidigital number, since it uses as much as digits as its factorization.

137887031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170832.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 137887031 is about 11742.5308600829. The cubic root of 137887031 is about 516.6238760723.

The spelling of 137887031 in words is "one hundred thirty-seven million, eight hundred eighty-seven thousand, thirty-one".