138779179 has 8 divisors (see below), whose sum is σ = 173023488. Its totient is φ = 108139560.

The previous prime is 138779167. The next prime is 138779183. The reversal of 138779179 is 971977831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138779179 - 2¹³ = 138770987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138779149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901087 + ... + 901240.

It is an arithmetic number, because the mean of its divisors is an integer number (21627936).

Almost surely, 2^138779179 is an apocalyptic number.

138779179 is a deficient number, since it is larger than the sum of its proper divisors (34244309).

138779179 is a wasteful number, since it uses less digits than its factorization.

138779179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802345.

The product of its digits is 666792, while the sum is 52.

The square root of 138779179 is about 11780.4575038493. The cubic root of 138779179 is about 517.7356907532.

The spelling of 138779179 in words is "one hundred thirty-eight million, seven hundred seventy-nine thousand, one hundred seventy-nine".