138650279 has 16 divisors (see below), whose sum is σ = 148925952. Its totient is φ = 128782368.

The previous prime is 138650263. The next prime is 138650299. The reversal of 138650279 is 972056831.

It is not a de Polignac number, because 138650279 - 2⁴ = 138650263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138650219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129902 + ... + 130964.

It is an arithmetic number, because the mean of its divisors is an integer number (9307872).

Almost surely, 2^138650279 is an apocalyptic number.

138650279 is a deficient number, since it is larger than the sum of its proper divisors (10275673).

138650279 is a wasteful number, since it uses less digits than its factorization.

138650279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 138650279 is about 11774.9853078465. The cubic root of 138650279 is about 517.5753477692.

The spelling of 138650279 in words is "one hundred thirty-eight million, six hundred fifty thousand, two hundred seventy-nine".