139897184 has 24 divisors (see below), whose sum is σ = 314769168. Its totient is φ = 59955840.

The previous prime is 139897169. The next prime is 139897211. The reversal of 139897184 is 481798931.

139897184 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×139897184² = 39142444182259712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312047 + ... + 312494.

It is an arithmetic number, because the mean of its divisors is an integer number (13115382).

Almost surely, 2^139897184 is an apocalyptic number.

139897184 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

139897184 is an abundant number, since it is smaller than the sum of its proper divisors (174871984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139897184 is an equidigital number, since it uses as much as digits as its factorization.

139897184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624558 (or 624550 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 139897184 is about 11827.8139992139. The cubic root of 139897184 is about 519.1222667997.

The spelling of 139897184 in words is "one hundred thirty-nine million, eight hundred ninety-seven thousand, one hundred eighty-four".