65020649 has 2 divisors, whose sum is σ = 65020650. Its totient is φ = 65020648.

The previous prime is 65020643. The next prime is 65020651. The reversal of 65020649 is 94602056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61905424 + 3115225 = 7868^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 65020649 - 2⁴ = 65020633 is a prime.

Together with 65020651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65020643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510324 + 32510325.

It is an arithmetic number, because the mean of its divisors is an integer number (32510325).

Almost surely, 2^65020649 is an apocalyptic number.

It is an amenable number.

65020649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65020649 is an equidigital number, since it uses as much as digits as its factorization.

65020649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65020649 is about 8063.5382432280. The cubic root of 65020649 is about 402.1151477441.

The spelling of 65020649 in words is "sixty-five million, twenty thousand, six hundred forty-nine".