138637754 has 16 divisors (see below), whose sum is σ = 222215400. Its totient is φ = 64641024.

The previous prime is 138637739. The next prime is 138637783. The reversal of 138637754 is 457736831.

It can be written as a sum of positive squares in 4 ways, for example, as 109725625 + 28912129 = 10475^2 + 5377^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14999 + ... + 22410.

Almost surely, 2^138637754 is an apocalyptic number.

138637754 is a deficient number, since it is larger than the sum of its proper divisors (83577646).

138637754 is a wasteful number, since it uses less digits than its factorization.

138637754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37537.

The product of its digits is 423360, while the sum is 44.

The square root of 138637754 is about 11774.4534480374. The cubic root of 138637754 is about 517.5597622099.

The spelling of 138637754 in words is "one hundred thirty-eight million, six hundred thirty-seven thousand, seven hundred fifty-four".