65813263 has 4 divisors (see below), whose sum is σ = 67343848. Its totient is φ = 64282680.

The previous prime is 65813233. The next prime is 65813309. The reversal of 65813263 is 36231856.

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 65813263 - 2¹⁷ = 65682191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65813203) 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, 765228 + ... + 765313.

It is an arithmetic number, because the mean of its divisors is an integer number (16835962).

Almost surely, 2^65813263 is an apocalyptic number.

65813263 is a deficient number, since it is larger than the sum of its proper divisors (1530585).

65813263 is a wasteful number, since it uses less digits than its factorization.

65813263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530584.

The product of its digits is 25920, while the sum is 34.

The square root of 65813263 is about 8112.5373959076. The cubic root of 65813263 is about 403.7425061631.

The spelling of 65813263 in words is "sixty-five million, eight hundred thirteen thousand, two hundred sixty-three".