139999992 has 32 divisors (see below), whose sum is σ = 381818880. Its totient is φ = 42424160.

The previous prime is 139999991. The next prime is 140000041. The reversal of 139999992 is 299999931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264888 + ... + 265415.

It is an arithmetic number, because the mean of its divisors is an integer number (11931840).

Almost surely, 2^139999992 is an apocalyptic number.

139999992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139999992 is an abundant number, since it is smaller than the sum of its proper divisors (241818888).

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

139999992 is a wasteful number, since it uses less digits than its factorization.

139999992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530323 (or 530319 counting only the distinct ones).

The product of its digits is 3188646, while the sum is 60.

The square root of 139999992 is about 11832.1592281375. The cubic root of 139999992 is about 519.2494002946.

It can be divided in two parts, 1 and 39999992, that added together give a palindrome (39999993).

The spelling of 139999992 in words is "one hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-two".