137213439 has 16 divisors (see below), whose sum is σ = 199879680. Its totient is φ = 83036160.

The previous prime is 137213437. The next prime is 137213507. The reversal of 137213439 is 934312731.

It is not a de Polignac number, because 137213439 - 2¹ = 137213437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137213431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22674 + ... + 28080.

It is an arithmetic number, because the mean of its divisors is an integer number (12492480).

Almost surely, 2^137213439 is an apocalyptic number.

137213439 is a deficient number, since it is larger than the sum of its proper divisors (62666241).

137213439 is a wasteful number, since it uses less digits than its factorization.

137213439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6190.

The product of its digits is 13608, while the sum is 33.

The square root of 137213439 is about 11713.8140244755. The cubic root of 137213439 is about 515.7812492936.

The spelling of 137213439 in words is "one hundred thirty-seven million, two hundred thirteen thousand, four hundred thirty-nine".