139933 has 4 divisors (see below), whose sum is σ = 143388. Its totient is φ = 136480.

The previous prime is 139921. The next prime is 139939. The reversal of 139933 is 339931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 339931 = 41 ⋅8291.

It can be written as a sum of positive squares in 2 ways, for example, as 68644 + 71289 = 262^2 + 267^2 .

It is a cyclic number.

It is not a de Polignac number, because 139933 - 2⁵ = 139901 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139939) 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, 1666 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (35847).

2¹³⁹⁹³³ is an apocalyptic number.

It is an amenable number.

139933 is a deficient number, since it is larger than the sum of its proper divisors (3455).

139933 is an equidigital number, since it uses as much as digits as its factorization.

139933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454.

The product of its digits is 2187, while the sum is 28.

The square root of 139933 is about 374.0761954469. The cubic root of 139933 is about 51.9166564324.

The spelling of 139933 in words is "one hundred thirty-nine thousand, nine hundred thirty-three".