137386561 has 4 divisors (see below), whose sum is σ = 147954772. Its totient is φ = 126818352.

The previous prime is 137386553. The next prime is 137386573. The reversal of 137386561 is 165683731.

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 31708161 + 105678400 = 5631^2 + 10280^2 .

It is a cyclic number.

It is not a de Polignac number, because 137386561 - 2³ = 137386553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137386861) 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, 5284086 + ... + 5284111.

It is an arithmetic number, because the mean of its divisors is an integer number (36988693).

Almost surely, 2^137386561 is an apocalyptic number.

It is an amenable number.

137386561 is a deficient number, since it is larger than the sum of its proper divisors (10568211).

137386561 is a wasteful number, since it uses less digits than its factorization.

137386561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10568210.

The product of its digits is 90720, while the sum is 40.

The square root of 137386561 is about 11721.2013462785. The cubic root of 137386561 is about 515.9980782834.

The spelling of 137386561 in words is "one hundred thirty-seven million, three hundred eighty-six thousand, five hundred sixty-one".