139291018 has 8 divisors (see below), whose sum is σ = 213795648. Its totient is φ = 68025804.

The previous prime is 139291003. The next prime is 139291021. The reversal of 139291018 is 810192931.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809746 + ... + 809917.

It is an arithmetic number, because the mean of its divisors is an integer number (26724456).

Almost surely, 2^139291018 is an apocalyptic number.

139291018 is a deficient number, since it is larger than the sum of its proper divisors (74504630).

139291018 is a wasteful number, since it uses less digits than its factorization.

139291018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619708.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 139291018 is about 11802.1615816765. The cubic root of 139291018 is about 518.3714061930.

The spelling of 139291018 in words is "one hundred thirty-nine million, two hundred ninety-one thousand, eighteen".