137438929 has 4 divisors (see below), whose sum is σ = 140791140. Its totient is φ = 134086720.

The previous prime is 137438921. The next prime is 137438933. The reversal of 137438929 is 929834731.

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 24059025 + 113379904 = 4905^2 + 10648^2 .

It is a cyclic number.

It is not a de Polignac number, because 137438929 - 2³ = 137438921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137438921) 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 3 ways as a sum of consecutive naturals, for example, 1676044 + ... + 1676125.

It is an arithmetic number, because the mean of its divisors is an integer number (35197785).

Almost surely, 2^137438929 is an apocalyptic number.

It is an amenable number.

137438929 is a deficient number, since it is larger than the sum of its proper divisors (3352211).

137438929 is an equidigital number, since it uses as much as digits as its factorization.

137438929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352210.

The product of its digits is 326592, while the sum is 46.

The square root of 137438929 is about 11723.4350341527. The cubic root of 137438929 is about 516.0636314073.

The spelling of 137438929 in words is "one hundred thirty-seven million, four hundred thirty-eight thousand, nine hundred twenty-nine".