959639 has 4 divisors (see below), whose sum is σ = 992760. Its totient is φ = 926520.

The previous prime is 959627. The next prime is 959659. The reversal of 959639 is 936959.

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: 936959 = 601 ⋅1559.

It is a cyclic number.

It is not a de Polignac number, because 959639 - 2⁸ = 959383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 959596 and 959605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (959659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16517 + ... + 16574.

It is an arithmetic number, because the mean of its divisors is an integer number (248190).

2⁹⁵⁹⁶³⁹ is an apocalyptic number.

959639 is a deficient number, since it is larger than the sum of its proper divisors (33121).

959639 is a wasteful number, since it uses less digits than its factorization.

959639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33120.

The product of its digits is 65610, while the sum is 41.

The square root of 959639 is about 979.6116577502. The cubic root of 959639 is about 98.6361161096.

The spelling of 959639 in words is "nine hundred fifty-nine thousand, six hundred thirty-nine".