139563 has 10 divisors (see below), whose sum is σ = 208604. Its totient is φ = 92988.

The previous prime is 139547. The next prime is 139571. The reversal of 139563 is 365931.

It is not a de Polignac number, because 139563 - 2⁴ = 139547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139663) 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 9 ways as a sum of consecutive naturals, for example, 781 + ... + 942.

139563 is a Friedman number, since it can be written as 5169*3^3, using all its digits and the basic arithmetic operations.

2¹³⁹⁵⁶³ is an apocalyptic number.

139563 is a deficient number, since it is larger than the sum of its proper divisors (69041).

139563 is an equidigital number, since it uses as much as digits as its factorization.

139563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735 (or 1726 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 139563 is about 373.5813164493. The cubic root of 139563 is about 51.8708580425.

The spelling of 139563 in words is "one hundred thirty-nine thousand, five hundred sixty-three".