264605399 has 2 divisors, whose sum is σ = 264605400. Its totient is φ = 264605398.

The previous prime is 264605387. The next prime is 264605417. The reversal of 264605399 is 993506462.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264605399 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 (264605339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132302699 + 132302700.

It is an arithmetic number, because the mean of its divisors is an integer number (132302700).

Almost surely, 2^264605399 is an apocalyptic number.

264605399 is a deficient number, since it is larger than the sum of its proper divisors (1).

264605399 is an equidigital number, since it uses as much as digits as its factorization.

264605399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 264605399 is about 16266.6960074872. The cubic root of 264605399 is about 641.9968547964.

The spelling of 264605399 in words is "two hundred sixty-four million, six hundred five thousand, three hundred ninety-nine".