139013889 has 16 divisors (see below), whose sum is σ = 218664960. Its totient is φ = 76873680.

The previous prime is 139013887. The next prime is 139013893. The reversal of 139013889 is 988310931.

It is a happy number.

It is not a de Polignac number, because 139013889 - 2¹ = 139013887 is a prime.

It is a super-2 number, since 2×139013889² = 38649722669808642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139013889.

It is not an unprimeable number, because it can be changed into a prime (139013881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106119 + ... + 107420.

It is an arithmetic number, because the mean of its divisors is an integer number (13666560).

Almost surely, 2^139013889 is an apocalyptic number.

It is an amenable number.

139013889 is a deficient number, since it is larger than the sum of its proper divisors (79651071).

139013889 is a wasteful number, since it uses less digits than its factorization.

139013889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213580.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 139013889 is about 11790.4151326406. The cubic root of 139013889 is about 518.0273995038.

The spelling of 139013889 in words is "one hundred thirty-nine million, thirteen thousand, eight hundred eighty-nine".