139964 has 12 divisors (see below), whose sum is σ = 267288. Its totient is φ = 63600.

The previous prime is 139943. The next prime is 139967. The reversal of 139964 is 469931.

139964 is nontrivially palindromic in base 6.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 139964.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139964.

It is not an unprimeable number, because it can be changed into a prime (139967) 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, 1547 + ... + 1634.

It is an arithmetic number, because the mean of its divisors is an integer number (22274).

139964 is a Friedman number, since it can be written as 6^(9-1)/(9+3)-4, using all its digits and the basic arithmetic operations.

2¹³⁹⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

139964 is a deficient number, since it is larger than the sum of its proper divisors (127324).

139964 is a wasteful number, since it uses less digits than its factorization.

139964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196 (or 3194 counting only the distinct ones).

The product of its digits is 5832, while the sum is 32.

The square root of 139964 is about 374.1176285609. The cubic root of 139964 is about 51.9204899277.

The spelling of 139964 in words is "one hundred thirty-nine thousand, nine hundred sixty-four".