139990 has 8 divisors (see below), whose sum is σ = 252000. Its totient is φ = 55992.

The previous prime is 139987. The next prime is 139991. The reversal of 139990 is 99931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 6990 + ... + 7009.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2¹³⁹⁹⁹⁰ is an apocalyptic number.

139990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139990 is a deficient number, since it is larger than the sum of its proper divisors (112010).

139990 is a wasteful number, since it uses less digits than its factorization.

139990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14006.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 139990 is about 374.1523753767. The cubic root of 139990 is about 51.9237046810.

The spelling of 139990 in words is "one hundred thirty-nine thousand, nine hundred ninety".