396716669 has 2 divisors, whose sum is σ = 396716670. Its totient is φ = 396716668.

The previous prime is 396716659. The next prime is 396716681. The reversal of 396716669 is 966617693.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390655225 + 6061444 = 19765^2 + 2462^2 .

It is a cyclic number.

It is not a de Polignac number, because 396716669 - 2⁴ = 396716653 is a prime.

It is a super-2 number, since 2×396716669² = 314768230924911122, 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 396716669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396716609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198358334 + 198358335.

It is an arithmetic number, because the mean of its divisors is an integer number (198358335).

Almost surely, 2^396716669 is an apocalyptic number.

It is an amenable number.

396716669 is a deficient number, since it is larger than the sum of its proper divisors (1).

396716669 is an equidigital number, since it uses as much as digits as its factorization.

396716669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 396716669 is about 19917.7475885201. The cubic root of 396716669 is about 734.7847760170.

The spelling of 396716669 in words is "three hundred ninety-six million, seven hundred sixteen thousand, six hundred sixty-nine".