138919662023 has 4 divisors (see below), whose sum is σ = 138920411520. Its totient is φ = 138918912528.

The previous prime is 138919661987. The next prime is 138919662029. The reversal of 138919662023 is 320266919831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 138919662023 - 2¹² = 138919657927 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 (138919662029) 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, 128963 + ... + 542651.

It is an arithmetic number, because the mean of its divisors is an integer number (34730102880).

Almost surely, 2^138919662023 is an apocalyptic number.

138919662023 is a deficient number, since it is larger than the sum of its proper divisors (749497).

138919662023 is an equidigital number, since it uses as much as digits as its factorization.

138919662023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749496.

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 138919662023 in words is "one hundred thirty-eight billion, nine hundred nineteen million, six hundred sixty-two thousand, twenty-three".