137643938 has 16 divisors (see below), whose sum is σ = 210361536. Its totient is φ = 67529040.

The previous prime is 137643931. The next prime is 137643953. The reversal of 137643938 is 839346731.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137643931) 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 7 ways as a sum of consecutive naturals, for example, 60245 + ... + 62487.

It is an arithmetic number, because the mean of its divisors is an integer number (13147596).

Almost surely, 2^137643938 is an apocalyptic number.

137643938 is a deficient number, since it is larger than the sum of its proper divisors (72717598).

137643938 is a wasteful number, since it uses less digits than its factorization.

137643938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809.

The product of its digits is 326592, while the sum is 44.

The square root of 137643938 is about 11732.1753311140. The cubic root of 137643938 is about 516.3200971443.

The spelling of 137643938 in words is "one hundred thirty-seven million, six hundred forty-three thousand, nine hundred thirty-eight".