64433399 has 2 divisors, whose sum is σ = 64433400. Its totient is φ = 64433398.

The previous prime is 64433371. The next prime is 64433441. The reversal of 64433399 is 99333446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64433399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64433329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32216699 + 32216700.

It is an arithmetic number, because the mean of its divisors is an integer number (32216700).

Almost surely, 2^64433399 is an apocalyptic number.

64433399 is a deficient number, since it is larger than the sum of its proper divisors (1).

64433399 is an equidigital number, since it uses as much as digits as its factorization.

64433399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 41.

The square root of 64433399 is about 8027.0417340388. The cubic root of 64433399 is about 400.9008840798.

It can be divided in two parts, 644 and 33399, that added together give a palindrome (34043).

The spelling of 64433399 in words is "sixty-four million, four hundred thirty-three thousand, three hundred ninety-nine".