138738601 has 4 divisors (see below), whose sum is σ = 138959104. Its totient is φ = 138518100.

The previous prime is 138738569. The next prime is 138738659. The reversal of 138738601 is 106837831.

138738601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138738601 - 2⁵ = 138738569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138738101) 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, 109305 + ... + 110566.

It is an arithmetic number, because the mean of its divisors is an integer number (34739776).

Almost surely, 2^138738601 is an apocalyptic number.

It is an amenable number.

138738601 is a deficient number, since it is larger than the sum of its proper divisors (220503).

138738601 is an equidigital number, since it uses as much as digits as its factorization.

138738601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220502.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 138738601 is about 11778.7351188487. The cubic root of 138738601 is about 517.6852251456.

The spelling of 138738601 in words is "one hundred thirty-eight million, seven hundred thirty-eight thousand, six hundred one".