64297789 has 2 divisors, whose sum is σ = 64297790. Its totient is φ = 64297788.

The previous prime is 64297781. The next prime is 64297817. The reversal of 64297789 is 98779246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57836025 + 6461764 = 7605^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 64297789 - 2³ = 64297781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64297781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32148894 + 32148895.

It is an arithmetic number, because the mean of its divisors is an integer number (32148895).

Almost surely, 2^64297789 is an apocalyptic number.

It is an amenable number.

64297789 is a deficient number, since it is larger than the sum of its proper divisors (1).

64297789 is an equidigital number, since it uses as much as digits as its factorization.

64297789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 64297789 is about 8018.5902127494. The cubic root of 64297789 is about 400.6194340086.

The spelling of 64297789 in words is "sixty-four million, two hundred ninety-seven thousand, seven hundred eighty-nine".