138825237427 has 4 divisors (see below), whose sum is σ = 138834765160. Its totient is φ = 138815709696.

The previous prime is 138825237389. The next prime is 138825237487. The reversal of 138825237427 is 724732528831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724732528831 = 90511 ⋅8007121.

It is a cyclic number.

It is not a de Polignac number, because 138825237427 - 2¹¹ = 138825235379 is a prime.

It is a super-3 number, since 3×138825237427³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138825237487) 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, 4741977 + ... + 4771162.

It is an arithmetic number, because the mean of its divisors is an integer number (34708691290).

Almost surely, 2^138825237427 is an apocalyptic number.

138825237427 is a deficient number, since it is larger than the sum of its proper divisors (9527733).

138825237427 is an equidigital number, since it uses as much as digits as its factorization.

138825237427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9527732.

The product of its digits is 4515840, while the sum is 52.

The spelling of 138825237427 in words is "one hundred thirty-eight billion, eight hundred twenty-five million, two hundred thirty-seven thousand, four hundred twenty-seven".