139619394 has 12 divisors (see below), whose sum is σ = 302508726. Its totient is φ = 46539792.

The previous prime is 139619393. The next prime is 139619411. The reversal of 139619394 is 493916931.

It can be written as a sum of positive squares in only one way, i.e., 99740169 + 39879225 = 9987^2 + 6315^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (139619393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3878299 + ... + 3878334.

Almost surely, 2^139619394 is an apocalyptic number.

139619394 is an abundant number, since it is smaller than the sum of its proper divisors (162889332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139619394 is a wasteful number, since it uses less digits than its factorization.

139619394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7756641 (or 7756638 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 139619394 is about 11816.0650810665. The cubic root of 139619394 is about 518.7784368405.

The spelling of 139619394 in words is "one hundred thirty-nine million, six hundred nineteen thousand, three hundred ninety-four".