138554479 has 16 divisors (see below), whose sum is σ = 169516800. Its totient is φ = 110597184.

The previous prime is 138554477. The next prime is 138554503. The reversal of 138554479 is 974455831.

It is a cyclic number.

It is not a de Polignac number, because 138554479 - 2¹ = 138554477 is a prime.

It is a super-2 number, since 2×138554479² = 38394687301922882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138554477) 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, 982 + ... + 16675.

It is an arithmetic number, because the mean of its divisors is an integer number (10594800).

Almost surely, 2^138554479 is an apocalyptic number.

138554479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

138554479 is a deficient number, since it is larger than the sum of its proper divisors (30962321).

138554479 is a wasteful number, since it uses less digits than its factorization.

138554479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17742.

The product of its digits is 604800, while the sum is 46.

The square root of 138554479 is about 11770.9166592921. The cubic root of 138554479 is about 517.4561145854.

The spelling of 138554479 in words is "one hundred thirty-eight million, five hundred fifty-four thousand, four hundred seventy-nine".