65823623 has 4 divisors (see below), whose sum is σ = 65845080. Its totient is φ = 65802168.

The previous prime is 65823601. The next prime is 65823647. The reversal of 65823623 is 32632856.

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 65823623 - 2⁸ = 65823367 is a prime.

It is a super-2 number, since 2×65823623² = 8665498689692258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65823673) 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, 5165 + ... + 12582.

It is an arithmetic number, because the mean of its divisors is an integer number (16461270).

Almost surely, 2^65823623 is an apocalyptic number.

65823623 is a deficient number, since it is larger than the sum of its proper divisors (21457).

65823623 is a wasteful number, since it uses less digits than its factorization.

65823623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21456.

The product of its digits is 51840, while the sum is 35.

The square root of 65823623 is about 8113.1758886394. The cubic root of 65823623 is about 403.7636901044.

The spelling of 65823623 in words is "sixty-five million, eight hundred twenty-three thousand, six hundred twenty-three".