65321719 has 2 divisors, whose sum is σ = 65321720. Its totient is φ = 65321718.

The previous prime is 65321693. The next prime is 65321723. The reversal of 65321719 is 91712356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65321719 - 2¹¹ = 65319671 is a prime.

It is a super-2 number, since 2×65321719² = 8533853946229922, which contains 22 as substring.

It is equal to p_3858406 and since 65321719 and 3858406 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65321779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32660859 + 32660860.

It is an arithmetic number, because the mean of its divisors is an integer number (32660860).

Almost surely, 2^65321719 is an apocalyptic number.

65321719 is a deficient number, since it is larger than the sum of its proper divisors (1).

65321719 is an equidigital number, since it uses as much as digits as its factorization.

65321719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 65321719 is about 8082.1852861711. The cubic root of 65321719 is about 402.7348402577.

The spelling of 65321719 in words is "sixty-five million, three hundred twenty-one thousand, seven hundred nineteen".