138299586391 has 4 divisors (see below), whose sum is σ = 139965846552. Its totient is φ = 136633326232.

The previous prime is 138299586389. The next prime is 138299586407. The reversal of 138299586391 is 193685992831.

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 138299586391 - 2¹ = 138299586389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138299586301) 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, 833129956 + ... + 833130121.

It is an arithmetic number, because the mean of its divisors is an integer number (34991461638).

Almost surely, 2^138299586391 is an apocalyptic number.

138299586391 is a deficient number, since it is larger than the sum of its proper divisors (1666260161).

138299586391 is an equidigital number, since it uses as much as digits as its factorization.

138299586391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666260160.

The product of its digits is 25194240, while the sum is 64.

The spelling of 138299586391 in words is "one hundred thirty-eight billion, two hundred ninety-nine million, five hundred eighty-six thousand, three hundred ninety-one".