65381933 has 4 divisors (see below), whose sum is σ = 65398140. Its totient is φ = 65365728.

The previous prime is 65381929. The next prime is 65381959. The reversal of 65381933 is 33918356.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 45995524 = 4403^2 + 6782^2 .

It is a cyclic number.

It is not a de Polignac number, because 65381933 - 2² = 65381929 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 (65381993) 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, 3263 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (16349535).

Almost surely, 2^65381933 is an apocalyptic number.

It is an amenable number.

65381933 is a deficient number, since it is larger than the sum of its proper divisors (16207).

65381933 is an equidigital number, since it uses as much as digits as its factorization.

65381933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16206.

The product of its digits is 58320, while the sum is 38.

The square root of 65381933 is about 8085.9095344927. The cubic root of 65381933 is about 402.8585501483.

The spelling of 65381933 in words is "sixty-five million, three hundred eighty-one thousand, nine hundred thirty-three".