64900193 has 2 divisors, whose sum is σ = 64900194. Its totient is φ = 64900192.

The previous prime is 64900141. The next prime is 64900217. The reversal of 64900193 is 39100946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 3794704 = 7817^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 64900193 - 2⁸ = 64899937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64900103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32450096 + 32450097.

It is an arithmetic number, because the mean of its divisors is an integer number (32450097).

Almost surely, 2^64900193 is an apocalyptic number.

It is an amenable number.

64900193 is a deficient number, since it is larger than the sum of its proper divisors (1).

64900193 is an equidigital number, since it uses as much as digits as its factorization.

64900193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 64900193 is about 8056.0656030099. The cubic root of 64900193 is about 401.8666773219.

The spelling of 64900193 in words is "sixty-four million, nine hundred thousand, one hundred ninety-three".