137388697 has 4 divisors (see below), whose sum is σ = 137420836. Its totient is φ = 137356560.

The previous prime is 137388673. The next prime is 137388707. The reversal of 137388697 is 796883731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81378441 + 56010256 = 9021^2 + 7484^2 .

It is a cyclic number.

It is not a de Polignac number, because 137388697 - 2²⁷ = 3170969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137388607) 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, 8454 + ... + 18607.

It is an arithmetic number, because the mean of its divisors is an integer number (34355209).

Almost surely, 2^137388697 is an apocalyptic number.

It is an amenable number.

137388697 is a deficient number, since it is larger than the sum of its proper divisors (32139).

137388697 is an equidigital number, since it uses as much as digits as its factorization.

137388697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32138.

The product of its digits is 1524096, while the sum is 52.

The square root of 137388697 is about 11721.2924628643. The cubic root of 137388697 is about 516.0007524076. Note that the first 3 decimals are identical.

The spelling of 137388697 in words is "one hundred thirty-seven million, three hundred eighty-eight thousand, six hundred ninety-seven".