65923919 has 2 divisors, whose sum is σ = 65923920. Its totient is φ = 65923918.

The previous prime is 65923853. The next prime is 65923927. The reversal of 65923919 is 91932956.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65923919 is a prime.

It is a super-2 number, since 2×65923919² = 8691926192637122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65923919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65923219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32961959 + 32961960.

It is an arithmetic number, because the mean of its divisors is an integer number (32961960).

Almost surely, 2^65923919 is an apocalyptic number.

65923919 is a deficient number, since it is larger than the sum of its proper divisors (1).

65923919 is an equidigital number, since it uses as much as digits as its factorization.

65923919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 44.

The square root of 65923919 is about 8119.3545925769. The cubic root of 65923919 is about 403.9686587294.

The spelling of 65923919 in words is "sixty-five million, nine hundred twenty-three thousand, nine hundred nineteen".