65993959 has 2 divisors, whose sum is σ = 65993960. Its totient is φ = 65993958.

The previous prime is 65993927. The next prime is 65993981. The reversal of 65993959 is 95939956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65993959 - 2⁵ = 65993927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65993359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32996979 + 32996980.

It is an arithmetic number, because the mean of its divisors is an integer number (32996980).

Almost surely, 2^65993959 is an apocalyptic number.

65993959 is a deficient number, since it is larger than the sum of its proper divisors (1).

65993959 is an equidigital number, since it uses as much as digits as its factorization.

65993959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2952450, while the sum is 55.

The square root of 65993959 is about 8123.6665982794. Note that the first 3 decimals coincide. The cubic root of 65993959 is about 404.1116718219. Note that the first 3 decimals are identical.

The spelling of 65993959 in words is "sixty-five million, nine hundred ninety-three thousand, nine hundred fifty-nine".