521984297 has 2 divisors, whose sum is σ = 521984298. Its totient is φ = 521984296.

The previous prime is 521984279. The next prime is 521984317. The reversal of 521984297 is 792489125.

Together with previous prime (521984279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359064601 + 162919696 = 18949^2 + 12764^2 .

It is a cyclic number.

It is not a de Polignac number, because 521984297 - 2¹⁴ = 521967913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521984597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260992148 + 260992149.

It is an arithmetic number, because the mean of its divisors is an integer number (260992149).

Almost surely, 2^521984297 is an apocalyptic number.

It is an amenable number.

521984297 is a deficient number, since it is larger than the sum of its proper divisors (1).

521984297 is an equidigital number, since it uses as much as digits as its factorization.

521984297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 521984297 is about 22846.9756641880. The cubic root of 521984297 is about 805.1667141822.

The spelling of 521984297 in words is "five hundred twenty-one million, nine hundred eighty-four thousand, two hundred ninety-seven".