65865823 has 2 divisors, whose sum is σ = 65865824. Its totient is φ = 65865822.

The previous prime is 65865791. The next prime is 65865827. The reversal of 65865823 is 32856856.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65865823 - 2⁵ = 65865791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65865823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65865827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32932911 + 32932912.

It is an arithmetic number, because the mean of its divisors is an integer number (32932912).

Almost surely, 2^65865823 is an apocalyptic number.

65865823 is a deficient number, since it is larger than the sum of its proper divisors (1).

65865823 is an equidigital number, since it uses as much as digits as its factorization.

65865823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 65865823 is about 8115.7761797625. The cubic root of 65865823 is about 403.8499569440.

The spelling of 65865823 in words is "sixty-five million, eight hundred sixty-five thousand, eight hundred twenty-three".