264646399 has 2 divisors, whose sum is σ = 264646400. Its totient is φ = 264646398.

The previous prime is 264646397. The next prime is 264646423. The reversal of 264646399 is 993646462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264646399 - 2¹ = 264646397 is a prime.

Together with 264646397, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264646391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132323199 + 132323200.

It is an arithmetic number, because the mean of its divisors is an integer number (132323200).

Almost surely, 2^264646399 is an apocalyptic number.

264646399 is a deficient number, since it is larger than the sum of its proper divisors (1).

264646399 is an equidigital number, since it uses as much as digits as its factorization.

264646399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 49.

The square root of 264646399 is about 16267.9562023015. The cubic root of 264646399 is about 642.0300117309.

The spelling of 264646399 in words is "two hundred sixty-four million, six hundred forty-six thousand, three hundred ninety-nine".