264430399 has 2 divisors, whose sum is σ = 264430400. Its totient is φ = 264430398.

The previous prime is 264430373. The next prime is 264430433. The reversal of 264430399 is 993034462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264430399 - 2¹⁵ = 264397631 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264430339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132215199 + 132215200.

It is an arithmetic number, because the mean of its divisors is an integer number (132215200).

Almost surely, 2^264430399 is an apocalyptic number.

264430399 is a deficient number, since it is larger than the sum of its proper divisors (1).

264430399 is an equidigital number, since it uses as much as digits as its factorization.

264430399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 264430399 is about 16261.3160291534. The cubic root of 264430399 is about 641.8552927736.

The spelling of 264430399 in words is "two hundred sixty-four million, four hundred thirty thousand, three hundred ninety-nine".