65309863 has 2 divisors, whose sum is σ = 65309864. Its totient is φ = 65309862.

The previous prime is 65309851. The next prime is 65309879. The reversal of 65309863 is 36890356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65309863 - 2¹⁷ = 65178791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65309813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32654931 + 32654932.

It is an arithmetic number, because the mean of its divisors is an integer number (32654932).

Almost surely, 2^65309863 is an apocalyptic number.

65309863 is a deficient number, since it is larger than the sum of its proper divisors (1).

65309863 is an equidigital number, since it uses as much as digits as its factorization.

65309863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 65309863 is about 8081.4517878906. The cubic root of 65309863 is about 402.7104731036.

The spelling of 65309863 in words is "sixty-five million, three hundred nine thousand, eight hundred sixty-three".