139973 has 8 divisors (see below), whose sum is σ = 151200. Its totient is φ = 129168.

The previous prime is 139969. The next prime is 139981. The reversal of 139973 is 379931.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 139973 - 2² = 139969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938 + ... + 1076.

It is an arithmetic number, because the mean of its divisors is an integer number (18900).

2¹³⁹⁹⁷³ is an apocalyptic number.

It is an amenable number.

139973 is a deficient number, since it is larger than the sum of its proper divisors (11227).

139973 is a wasteful number, since it uses less digits than its factorization.

139973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211.

The product of its digits is 5103, while the sum is 32.

The square root of 139973 is about 374.1296566700. The cubic root of 139973 is about 51.9216027720.

The spelling of 139973 in words is "one hundred thirty-nine thousand, nine hundred seventy-three".