64900643 has 2 divisors, whose sum is σ = 64900644. Its totient is φ = 64900642.

The previous prime is 64900613. The next prime is 64900657. The reversal of 64900643 is 34600946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64900643 - 2¹⁰ = 64899619 is a prime.

It is not a weakly prime, because it can be changed into another prime (64900613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32450321 + 32450322.

It is an arithmetic number, because the mean of its divisors is an integer number (32450322).

Almost surely, 2^64900643 is an apocalyptic number.

64900643 is a deficient number, since it is larger than the sum of its proper divisors (1).

64900643 is an equidigital number, since it uses as much as digits as its factorization.

64900643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 64900643 is about 8056.0935322276. The cubic root of 64900643 is about 401.8676061306.

The spelling of 64900643 in words is "sixty-four million, nine hundred thousand, six hundred forty-three".