396897769 has 2 divisors, whose sum is σ = 396897770. Its totient is φ = 396897768.

The previous prime is 396897719. The next prime is 396897791. The reversal of 396897769 is 967798693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257185369 + 139712400 = 16037^2 + 11820^2 .

It is a cyclic number.

It is not a de Polignac number, because 396897769 - 2¹¹ = 396895721 is a prime.

It is a super-2 number, since 2×396897769² = 315055678074354722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 396897769.

It is not a weakly prime, because it can be changed into another prime (396897719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198448884 + 198448885.

It is an arithmetic number, because the mean of its divisors is an integer number (198448885).

Almost surely, 2^396897769 is an apocalyptic number.

It is an amenable number.

396897769 is a deficient number, since it is larger than the sum of its proper divisors (1).

396897769 is an equidigital number, since it uses as much as digits as its factorization.

396897769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30862944, while the sum is 64.

The square root of 396897769 is about 19922.2932665896. The cubic root of 396897769 is about 734.8965680421.

The spelling of 396897769 in words is "three hundred ninety-six million, eight hundred ninety-seven thousand, seven hundred sixty-nine".