139963 has 4 divisors (see below), whose sum is σ = 142120. Its totient is φ = 137808.

The previous prime is 139943. The next prime is 139967. The reversal of 139963 is 369931.

139963 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 369931 = 83 ⋅4457.

It is a cyclic number.

It is not a de Polignac number, because 139963 - 2¹³ = 131771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

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, 978 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (35530).

2¹³⁹⁹⁶³ is an apocalyptic number.

139963 is a deficient number, since it is larger than the sum of its proper divisors (2157).

139963 is an equidigital number, since it uses as much as digits as its factorization.

139963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156.

The product of its digits is 4374, while the sum is 31.

The square root of 139963 is about 374.1162920804. The cubic root of 139963 is about 51.9203662754.

The spelling of 139963 in words is "one hundred thirty-nine thousand, nine hundred sixty-three".