137388969 has 6 divisors (see below), whose sum is σ = 198450746. Its totient is φ = 91592640.

The previous prime is 137388967. The next prime is 137388971. The reversal of 137388969 is 969883731.

It is an interprime number because it is at equal distance from previous prime (137388967) and next prime (137388971).

It can be written as a sum of positive squares in only one way, i.e., 132710400 + 4678569 = 11520^2 + 2163^2 .

It is not a de Polignac number, because 137388969 - 2¹ = 137388967 is a prime.

It is a super-2 number, since 2×137388969² = 37751457605765922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137388961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7632712 + ... + 7632729.

Almost surely, 2^137388969 is an apocalyptic number.

It is an amenable number.

137388969 is a deficient number, since it is larger than the sum of its proper divisors (61061777).

137388969 is a wasteful number, since it uses less digits than its factorization.

137388969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15265447 (or 15265444 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 137388969 is about 11721.3040656746. The cubic root of 137388969 is about 516.0010929308.

The spelling of 137388969 in words is "one hundred thirty-seven million, three hundred eighty-eight thousand, nine hundred sixty-nine".