965639 has 2 divisors, whose sum is σ = 965640. Its totient is φ = 965638.

The previous prime is 965623. The next prime is 965647. The reversal of 965639 is 936569.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 965639 - 2⁴ = 965623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (965659) 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 as a sum of consecutive naturals, namely, 482819 + 482820.

It is an arithmetic number, because the mean of its divisors is an integer number (482820).

2⁹⁶⁵⁶³⁹ is an apocalyptic number.

965639 is a deficient number, since it is larger than the sum of its proper divisors (1).

965639 is an equidigital number, since it uses as much as digits as its factorization.

965639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 38.

The square root of 965639 is about 982.6693238318. The cubic root of 965639 is about 98.8412583725.

The spelling of 965639 in words is "nine hundred sixty-five thousand, six hundred thirty-nine".