139999994 has 32 divisors (see below), whose sum is σ = 224940240. Its totient is φ = 65228800.

The previous prime is 139999991. The next prime is 140000041. The reversal of 139999994 is 499999931.

139999994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 877969 + 139122025 = 937^2 + 11795^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139999991) 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, 268454 + ... + 268974.

Almost surely, 2^139999994 is an apocalyptic number.

139999994 is a deficient number, since it is larger than the sum of its proper divisors (84940246).

139999994 is a wasteful number, since it uses less digits than its factorization.

139999994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706.

The product of its digits is 6377292, while the sum is 62.

The square root of 139999994 is about 11832.1593126530. The cubic root of 139999994 is about 519.2494027673.

The spelling of 139999994 in words is "one hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-four".