139994 has 4 divisors (see below), whose sum is σ = 209994. Its totient is φ = 69996.

The previous prime is 139991. The next prime is 139999. The reversal of 139994 is 499931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499931 = 29 ⋅17239.

It can be written as a sum of positive squares in only one way, i.e., 97969 + 42025 = 313^2 + 205^2 .

It is not an unprimeable number, because it can be changed into a prime (139991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34997 + ... + 35000.

2¹³⁹⁹⁹⁴ is an apocalyptic number.

139994 is a deficient number, since it is larger than the sum of its proper divisors (70000).

139994 is an equidigital number, since it uses as much as digits as its factorization.

139994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69999.

The product of its digits is 8748, while the sum is 35.

The square root of 139994 is about 374.1577207542. The cubic root of 139994 is about 51.9241992230.

The spelling of 139994 in words is "one hundred thirty-nine thousand, nine hundred ninety-four".