65649593 has 2 divisors, whose sum is σ = 65649594. Its totient is φ = 65649592.

The previous prime is 65649539. The next prime is 65649601. The reversal of 65649593 is 39594656.

Together with previous prime (65649539) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 1841449 = 7988^2 + 1357^2 .

It is a cyclic number.

It is not a de Polignac number, because 65649593 - 2¹² = 65645497 is a prime.

It is a super-2 number, since 2×65649593² = 8619738122131298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65649523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32824796 + 32824797.

It is an arithmetic number, because the mean of its divisors is an integer number (32824797).

Almost surely, 2^65649593 is an apocalyptic number.

It is an amenable number.

65649593 is a deficient number, since it is larger than the sum of its proper divisors (1).

65649593 is an equidigital number, since it uses as much as digits as its factorization.

65649593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 47.

The square root of 65649593 is about 8102.4436437411. The cubic root of 65649593 is about 403.4075413095.

The spelling of 65649593 in words is "sixty-five million, six hundred forty-nine thousand, five hundred ninety-three".