264497647 has 4 divisors (see below), whose sum is σ = 268833736. Its totient is φ = 260161560.

The previous prime is 264497599. The next prime is 264497659. The reversal of 264497647 is 746794462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264497647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 264497647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264497147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2167953 + ... + 2168074.

It is an arithmetic number, because the mean of its divisors is an integer number (67208434).

Almost surely, 2^264497647 is an apocalyptic number.

264497647 is a deficient number, since it is larger than the sum of its proper divisors (4336089).

264497647 is an equidigital number, since it uses as much as digits as its factorization.

264497647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4336088.

The product of its digits is 2032128, while the sum is 49.

The square root of 264497647 is about 16263.3836270316. The cubic root of 264497647 is about 641.9096988056.

The spelling of 264497647 in words is "two hundred sixty-four million, four hundred ninety-seven thousand, six hundred forty-seven".