137615997 has 4 divisors (see below), whose sum is σ = 183488000. Its totient is φ = 91743996.

The previous prime is 137615981. The next prime is 137616013. The reversal of 137615997 is 799516731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (137615981) and next prime (137616013).

It is not a de Polignac number, because 137615997 - 2⁴ = 137615981 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 (137615927) 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, 22935997 + ... + 22936002.

It is an arithmetic number, because the mean of its divisors is an integer number (45872000).

Almost surely, 2^137615997 is an apocalyptic number.

It is an amenable number.

137615997 is a deficient number, since it is larger than the sum of its proper divisors (45872003).

137615997 is an equidigital number, since it uses as much as digits as its factorization.

137615997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45872002.

The product of its digits is 357210, while the sum is 48.

The square root of 137615997 is about 11730.9844855408. The cubic root of 137615997 is about 516.2851580197.

The spelling of 137615997 in words is "one hundred thirty-seven million, six hundred fifteen thousand, nine hundred ninety-seven".