139594394 has 4 divisors (see below), whose sum is σ = 209391594. Its totient is φ = 69797196.

The previous prime is 139594393. The next prime is 139594409. The reversal of 139594394 is 493495931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 169 = 11815^2 + 13^2 .

It is not an unprimeable number, because it can be changed into a prime (139594393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34898597 + ... + 34898600.

Almost surely, 2^139594394 is an apocalyptic number.

139594394 is a deficient number, since it is larger than the sum of its proper divisors (69797200).

139594394 is an equidigital number, since it uses as much as digits as its factorization.

139594394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69797199.

The product of its digits is 524880, while the sum is 47.

The square root of 139594394 is about 11815.0071519234. The cubic root of 139594394 is about 518.7474711446.

The spelling of 139594394 in words is "one hundred thirty-nine million, five hundred ninety-four thousand, three hundred ninety-four".