139173904 has 10 divisors (see below), whose sum is σ = 269649470. Its totient is φ = 69586944.

The previous prime is 139173901. The next prime is 139173949. The reversal of 139173904 is 409371931.

It can be written as a sum of positive squares in only one way, i.e., 134560000 + 4613904 = 11600^2 + 2148^2 .

It is not an unprimeable number, because it can be changed into a prime (139173901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4349169 + ... + 4349200.

It is an arithmetic number, because the mean of its divisors is an integer number (26964947).

Almost surely, 2^139173904 is an apocalyptic number.

It is an amenable number.

139173904 is a deficient number, since it is larger than the sum of its proper divisors (130475566).

139173904 is an equidigital number, since it uses as much as digits as its factorization.

139173904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8698377 (or 8698371 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 139173904 is about 11797.1989895907. The cubic root of 139173904 is about 518.2260855734.

The spelling of 139173904 in words is "one hundred thirty-nine million, one hundred seventy-three thousand, nine hundred four".