565404397 has 2 divisors, whose sum is σ = 565404398. Its totient is φ = 565404396.

The previous prime is 565404379. The next prime is 565404401. The reversal of 565404397 is 793404565.

Together with previous prime (565404379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448634761 + 116769636 = 21181^2 + 10806^2 .

It is a cyclic number.

It is not a de Polignac number, because 565404397 - 2⁷ = 565404269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565474397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282702198 + 282702199.

It is an arithmetic number, because the mean of its divisors is an integer number (282702199).

Almost surely, 2^565404397 is an apocalyptic number.

It is an amenable number.

565404397 is a deficient number, since it is larger than the sum of its proper divisors (1).

565404397 is an equidigital number, since it uses as much as digits as its factorization.

565404397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 565404397 is about 23778.2336812472. The cubic root of 565404397 is about 826.9001305963.

The spelling of 565404397 in words is "five hundred sixty-five million, four hundred four thousand, three hundred ninety-seven".