64433249 has 2 divisors, whose sum is σ = 64433250. Its totient is φ = 64433248.

The previous prime is 64433233. The next prime is 64433261. The reversal of 64433249 is 94233446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48553024 + 15880225 = 6968^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 64433249 - 2⁴ = 64433233 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 (64433209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32216624 + 32216625.

It is an arithmetic number, because the mean of its divisors is an integer number (32216625).

Almost surely, 2^64433249 is an apocalyptic number.

It is an amenable number.

64433249 is a deficient number, since it is larger than the sum of its proper divisors (1).

64433249 is an equidigital number, since it uses as much as digits as its factorization.

64433249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 35.

The square root of 64433249 is about 8027.0323906161. The cubic root of 64433249 is about 400.9005729824.

The spelling of 64433249 in words is "sixty-four million, four hundred thirty-three thousand, two hundred forty-nine".