521523097 has 2 divisors, whose sum is σ = 521523098. Its totient is φ = 521523096.

The previous prime is 521523089. The next prime is 521523151. The reversal of 521523097 is 790325125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292273216 + 229249881 = 17096^2 + 15141^2 .

It is a cyclic number.

It is not a de Polignac number, because 521523097 - 2³ = 521523089 is a prime.

It is not a weakly prime, because it can be changed into another prime (521521097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260761548 + 260761549.

It is an arithmetic number, because the mean of its divisors is an integer number (260761549).

Almost surely, 2^521523097 is an apocalyptic number.

It is an amenable number.

521523097 is a deficient number, since it is larger than the sum of its proper divisors (1).

521523097 is an equidigital number, since it uses as much as digits as its factorization.

521523097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 521523097 is about 22836.8801941071. The cubic root of 521523097 is about 804.9295088925.

The spelling of 521523097 in words is "five hundred twenty-one million, five hundred twenty-three thousand, ninety-seven".