139189816 has 8 divisors (see below), whose sum is σ = 260980920. Its totient is φ = 69594904.

The previous prime is 139189811. The next prime is 139189823. The reversal of 139189816 is 618981931.

It is a happy number.

139189816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×139189816² = 38747609756227712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139189811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8699356 + ... + 8699371.

It is an arithmetic number, because the mean of its divisors is an integer number (32622615).

Almost surely, 2^139189816 is an apocalyptic number.

It is an amenable number.

139189816 is a deficient number, since it is larger than the sum of its proper divisors (121791104).

139189816 is a wasteful number, since it uses less digits than its factorization.

139189816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17398733 (or 17398729 counting only the distinct ones).

The product of its digits is 93312, while the sum is 46.

The square root of 139189816 is about 11797.8733676879. The cubic root of 139189816 is about 518.2458347242.

The spelling of 139189816 in words is "one hundred thirty-nine million, one hundred eighty-nine thousand, eight hundred sixteen".