64817783 has 2 divisors, whose sum is σ = 64817784. Its totient is φ = 64817782.

The previous prime is 64817773. The next prime is 64817791. The reversal of 64817783 is 38771846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64817783 - 2²⁴ = 48040567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64817773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32408891 + 32408892.

It is an arithmetic number, because the mean of its divisors is an integer number (32408892).

Almost surely, 2^64817783 is an apocalyptic number.

64817783 is a deficient number, since it is larger than the sum of its proper divisors (1).

64817783 is an equidigital number, since it uses as much as digits as its factorization.

64817783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 64817783 is about 8050.9491986970. The cubic root of 64817783 is about 401.6965090534.

The spelling of 64817783 in words is "sixty-four million, eight hundred seventeen thousand, seven hundred eighty-three".