65128963 has 2 divisors, whose sum is σ = 65128964. Its totient is φ = 65128962.

The previous prime is 65128933. The next prime is 65128967. The reversal of 65128963 is 36982156.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65128963 - 2²⁵ = 31574531 is a prime.

It is not a weakly prime, because it can be changed into another prime (65128967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32564481 + 32564482.

It is an arithmetic number, because the mean of its divisors is an integer number (32564482).

Almost surely, 2^65128963 is an apocalyptic number.

65128963 is a deficient number, since it is larger than the sum of its proper divisors (1).

65128963 is an equidigital number, since it uses as much as digits as its factorization.

65128963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 65128963 is about 8070.2517308941. The cubic root of 65128963 is about 402.3383103757.

The spelling of 65128963 in words is "sixty-five million, one hundred twenty-eight thousand, nine hundred sixty-three".