137397444 has 12 divisors (see below), whose sum is σ = 320594064. Its totient is φ = 45799144.

The previous prime is 137397433. The next prime is 137397457. The reversal of 137397444 is 444793731.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 137397396 and 137397405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5724882 + ... + 5724905.

It is an arithmetic number, because the mean of its divisors is an integer number (26716172).

Almost surely, 2^137397444 is an apocalyptic number.

It is an amenable number.

137397444 is an abundant number, since it is smaller than the sum of its proper divisors (183196620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137397444 is a wasteful number, since it uses less digits than its factorization.

137397444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11449794 (or 11449792 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 137397444 is about 11721.6655813071. The cubic root of 137397444 is about 516.0117027572.

The spelling of 137397444 in words is "one hundred thirty-seven million, three hundred ninety-seven thousand, four hundred forty-four".