396825817 has 2 divisors, whose sum is σ = 396825818. Its totient is φ = 396825816.

The previous prime is 396825749. The next prime is 396825827. The reversal of 396825817 is 718528693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310781641 + 86044176 = 17629^2 + 9276^2 .

It is a cyclic number.

It is not a de Polignac number, because 396825817 - 2¹¹ = 396823769 is a prime.

It is not a weakly prime, because it can be changed into another prime (396825827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198412908 + 198412909.

It is an arithmetic number, because the mean of its divisors is an integer number (198412909).

Almost surely, 2^396825817 is an apocalyptic number.

It is an amenable number.

396825817 is a deficient number, since it is larger than the sum of its proper divisors (1).

396825817 is an equidigital number, since it uses as much as digits as its factorization.

396825817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 396825817 is about 19920.4873685359. The cubic root of 396825817 is about 734.8521565441.

The spelling of 396825817 in words is "three hundred ninety-six million, eight hundred twenty-five thousand, eight hundred seventeen".