64423817 has 2 divisors, whose sum is σ = 64423818. Its totient is φ = 64423816.

The previous prime is 64423787. The next prime is 64423861. The reversal of 64423817 is 71832446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49900096 + 14523721 = 7064^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 64423817 - 2⁸ = 64423561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64420817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32211908 + 32211909.

It is an arithmetic number, because the mean of its divisors is an integer number (32211909).

Almost surely, 2^64423817 is an apocalyptic number.

It is an amenable number.

64423817 is a deficient number, since it is larger than the sum of its proper divisors (1).

64423817 is an equidigital number, since it uses as much as digits as its factorization.

64423817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 64423817 is about 8026.4448543549. Note that the first 3 decimals coincide. The cubic root of 64423817 is about 400.8810102112.

The spelling of 64423817 in words is "sixty-four million, four hundred twenty-three thousand, eight hundred seventeen".