138747519 has 16 divisors (see below), whose sum is σ = 216371200. Its totient is φ = 87629688.

The previous prime is 138747503. The next prime is 138747547. The reversal of 138747519 is 915747831.

138747519 is a `hidden beast` number, since 13 + 87 + 47 + 519 = 666.

It is not a de Polignac number, because 138747519 - 2⁴ = 138747503 is a prime.

It is a super-2 number, since 2×138747519² = 38501748057310722, 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 (138747559) 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, 134719 + ... + 135744.

It is an arithmetic number, because the mean of its divisors is an integer number (13523200).

Almost surely, 2^138747519 is an apocalyptic number.

138747519 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

138747519 is a deficient number, since it is larger than the sum of its proper divisors (77623681).

138747519 is a wasteful number, since it uses less digits than its factorization.

138747519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270491 (or 270485 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 138747519 is about 11779.1136763341. The cubic root of 138747519 is about 517.6963170308.

The spelling of 138747519 in words is "one hundred thirty-eight million, seven hundred forty-seven thousand, five hundred nineteen".