65396861 has 2 divisors, whose sum is σ = 65396862. Its totient is φ = 65396860.

The previous prime is 65396789. The next prime is 65396869. The reversal of 65396861 is 16869356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54671236 + 10725625 = 7394^2 + 3275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65396861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65396869) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32698430 + 32698431.

It is an arithmetic number, because the mean of its divisors is an integer number (32698431).

Almost surely, 2^65396861 is an apocalyptic number.

It is an amenable number.

65396861 is a deficient number, since it is larger than the sum of its proper divisors (1).

65396861 is an equidigital number, since it uses as much as digits as its factorization.

65396861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 65396861 is about 8086.8325690594. The cubic root of 65396861 is about 402.8892080305.

The spelling of 65396861 in words is "sixty-five million, three hundred ninety-six thousand, eight hundred sixty-one".