1389108405179 has 4 divisors (see below), whose sum is σ = 1515390987480. Its totient is φ = 1262825822880.

The previous prime is 1389108405173. The next prime is 1389108405197. The reversal of 1389108405179 is 9715048019831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389108405179 is a prime.

It is a super-2 number, since 2×1389108405179² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389108405173) 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, 63141291134 + ... + 63141291155.

It is an arithmetic number, because the mean of its divisors is an integer number (378847746870).

Almost surely, 2^{1389108405179} is an apocalyptic number.

1389108405179 is a deficient number, since it is larger than the sum of its proper divisors (126282582301).

1389108405179 is a wasteful number, since it uses less digits than its factorization.

1389108405179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126282582300.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 1389108405179 in words is "one trillion, three hundred eighty-nine billion, one hundred eight million, four hundred five thousand, one hundred seventy-nine".