8274258721 has 2 divisors, whose sum is σ = 8274258722. Its totient is φ = 8274258720.

The previous prime is 8274258689. The next prime is 8274258731. The reversal of 8274258721 is 1278524728.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8186630400 + 87628321 = 90480^2 + 9361^2 .

It is a cyclic number.

It is not a de Polignac number, because 8274258721 - 2⁵ = 8274258689 is a prime.

It is not a weakly prime, because it can be changed into another prime (8274258731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137129360 + 4137129361.

It is an arithmetic number, because the mean of its divisors is an integer number (4137129361).

Almost surely, 2^8274258721 is an apocalyptic number.

It is an amenable number.

8274258721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8274258721 is an equidigital number, since it uses as much as digits as its factorization.

8274258721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 501760, while the sum is 46.

The square root of 8274258721 is about 90962.9524641763. The cubic root of 8274258721 is about 2022.5985836741.

The spelling of 8274258721 in words is "eight billion, two hundred seventy-four million, two hundred fifty-eight thousand, seven hundred twenty-one".