264370721 has 2 divisors, whose sum is σ = 264370722. Its totient is φ = 264370720.

The previous prime is 264370703. The next prime is 264370753. The reversal of 264370721 is 127073462.

It is an a-pointer prime, because the next prime (264370753) can be obtained adding 264370721 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259371025 + 4999696 = 16105^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 264370721 - 2¹⁰ = 264369697 is a prime.

It is not a weakly prime, because it can be changed into another prime (264370021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132185360 + 132185361.

It is an arithmetic number, because the mean of its divisors is an integer number (132185361).

Almost surely, 2^264370721 is an apocalyptic number.

It is an amenable number.

264370721 is a deficient number, since it is larger than the sum of its proper divisors (1).

264370721 is an equidigital number, since it uses as much as digits as its factorization.

264370721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 264370721 is about 16259.4809572754. The cubic root of 264370721 is about 641.8070034162.

The spelling of 264370721 in words is "two hundred sixty-four million, three hundred seventy thousand, seven hundred twenty-one".