139391074 has 8 divisors (see below), whose sum is σ = 210683088. Its totient is φ = 69163380.

The previous prime is 139391071. The next prime is 139391089. The reversal of 139391074 is 470193931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (139391071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265752 + ... + 266275.

It is an arithmetic number, because the mean of its divisors is an integer number (26335386).

Almost surely, 2^139391074 is an apocalyptic number.

139391074 is a deficient number, since it is larger than the sum of its proper divisors (71292014).

139391074 is a wasteful number, since it uses less digits than its factorization.

139391074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532160.

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

The square root of 139391074 is about 11806.3997052446. The cubic root of 139391074 is about 518.4954959255.

The spelling of 139391074 in words is "one hundred thirty-nine million, three hundred ninety-one thousand, seventy-four".