139984131 has 32 divisors (see below), whose sum is σ = 225216000. Its totient is φ = 77216160.

The previous prime is 139984093. The next prime is 139984139. The reversal of 139984131 is 131489931.

It is a happy number.

It is not a de Polignac number, because 139984131 - 2¹¹ = 139982083 is a prime.

It is a super-2 number, since 2×139984131² = 39191113863650322, 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 139984131.

It is not an unprimeable number, because it can be changed into a prime (139984139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27496 + ... + 32186.

It is an arithmetic number, because the mean of its divisors is an integer number (7038000).

Almost surely, 2^139984131 is an apocalyptic number.

139984131 is a deficient number, since it is larger than the sum of its proper divisors (85231869).

139984131 is an equidigital number, since it uses as much as digits as its factorization.

139984131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744 (or 4730 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 139984131 is about 11831.4889595520. The cubic root of 139984131 is about 519.2297904702.

The spelling of 139984131 in words is "one hundred thirty-nine million, nine hundred eighty-four thousand, one hundred thirty-one".