139776923 has 16 divisors (see below), whose sum is σ = 169516032. Its totient is φ = 113508000.

The previous prime is 139776893. The next prime is 139776947. The reversal of 139776923 is 329677931.

It is a happy number.

139776923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 139776923 - 2⁶ = 139776859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139776523) 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, 11333 + ... + 20198.

It is an arithmetic number, because the mean of its divisors is an integer number (10594752).

Almost surely, 2^139776923 is an apocalyptic number.

139776923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

139776923 is a deficient number, since it is larger than the sum of its proper divisors (29739109).

139776923 is a wasteful number, since it uses less digits than its factorization.

139776923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31586.

The product of its digits is 428652, while the sum is 47.

The square root of 139776923 is about 11822.7290842681. The cubic root of 139776923 is about 518.9734716660.

The spelling of 139776923 in words is "one hundred thirty-nine million, seven hundred seventy-six thousand, nine hundred twenty-three".