138252792439 has 4 divisors (see below), whose sum is σ = 138259276960. Its totient is φ = 138246307920.

The previous prime is 138252792373. The next prime is 138252792443. The reversal of 138252792439 is 934297252831.

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

It is a cyclic number.

It is not a de Polignac number, because 138252792439 - 2¹⁷ = 138252661367 is a prime.

It is a super-2 number, since 2×138252792439² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138252792439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138252792239) 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, 3210174 + ... + 3252955.

It is an arithmetic number, because the mean of its divisors is an integer number (34564819240).

Almost surely, 2^138252792439 is an apocalyptic number.

138252792439 is a deficient number, since it is larger than the sum of its proper divisors (6484521).

138252792439 is an equidigital number, since it uses as much as digits as its factorization.

138252792439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6484520.

The product of its digits is 6531840, while the sum is 55.

The spelling of 138252792439 in words is "one hundred thirty-eight billion, two hundred fifty-two million, seven hundred ninety-two thousand, four hundred thirty-nine".