65564297 has 2 divisors, whose sum is σ = 65564298. Its totient is φ = 65564296.

The previous prime is 65564267. The next prime is 65564377. The reversal of 65564297 is 79246556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44943616 + 20620681 = 6704^2 + 4541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65564297 is a prime.

It is a super-2 number, since 2×65564297² = 8597354082208418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65564267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32782148 + 32782149.

It is an arithmetic number, because the mean of its divisors is an integer number (32782149).

Almost surely, 2^65564297 is an apocalyptic number.

It is an amenable number.

65564297 is a deficient number, since it is larger than the sum of its proper divisors (1).

65564297 is an equidigital number, since it uses as much as digits as its factorization.

65564297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 65564297 is about 8097.1783356920. The cubic root of 65564297 is about 403.2327549376.

The spelling of 65564297 in words is "sixty-five million, five hundred sixty-four thousand, two hundred ninety-seven".