139930623 has 24 divisors (see below), whose sum is σ = 235716000. Its totient is φ = 79958592.

The previous prime is 139930619. The next prime is 139930627. The reversal of 139930623 is 326039931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139930619) and next prime (139930627).

It is not a de Polignac number, because 139930623 - 2² = 139930619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139930627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19578 + ... + 25751.

It is an arithmetic number, because the mean of its divisors is an integer number (9821500).

Almost surely, 2^139930623 is an apocalyptic number.

139930623 is a deficient number, since it is larger than the sum of its proper divisors (95785377).

139930623 is an equidigital number, since it uses as much as digits as its factorization.

139930623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45356 (or 45339 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 139930623 is about 11829.2274895701. The cubic root of 139930623 is about 519.1636246648.

The spelling of 139930623 in words is "one hundred thirty-nine million, nine hundred thirty thousand, six hundred twenty-three".