65439263 has 4 divisors (see below), whose sum is σ = 65771640. Its totient is φ = 65106888.

The previous prime is 65439247. The next prime is 65439281. The reversal of 65439263 is 36293456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65439263 - 2⁴ = 65439247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65439203) 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, 165893 + ... + 166286.

It is an arithmetic number, because the mean of its divisors is an integer number (16442910).

Almost surely, 2^65439263 is an apocalyptic number.

65439263 is a deficient number, since it is larger than the sum of its proper divisors (332377).

65439263 is a wasteful number, since it uses less digits than its factorization.

65439263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332376.

The product of its digits is 116640, while the sum is 38.

The square root of 65439263 is about 8089.4538134537. The cubic root of 65439263 is about 402.9762642852.

The spelling of 65439263 in words is "sixty-five million, four hundred thirty-nine thousand, two hundred sixty-three".