139493818 has 16 divisors (see below), whose sum is σ = 213192000. Its totient is φ = 68434432.

The previous prime is 139493807. The next prime is 139493821. The reversal of 139493818 is 818394931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98298 + ... + 99706.

It is an arithmetic number, because the mean of its divisors is an integer number (13324500).

Almost surely, 2^139493818 is an apocalyptic number.

139493818 is a deficient number, since it is larger than the sum of its proper divisors (73698182).

139493818 is a wasteful number, since it uses less digits than its factorization.

139493818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309.

The product of its digits is 186624, while the sum is 46.

The square root of 139493818 is about 11810.7501031899. The cubic root of 139493818 is about 518.6228575425.

The spelling of 139493818 in words is "one hundred thirty-nine million, four hundred ninety-three thousand, eight hundred eighteen".