396619669 has 2 divisors, whose sum is σ = 396619670. Its totient is φ = 396619668.

The previous prime is 396619667. The next prime is 396619679. The reversal of 396619669 is 966916693.

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., 218744100 + 177875569 = 14790^2 + 13337^2 .

It is a cyclic number.

It is not a de Polignac number, because 396619669 - 2¹ = 396619667 is a prime.

It is a super-2 number, since 2×396619669² = 314614323675339122, which contains 22 as substring.

Together with 396619667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396619667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198309834 + 198309835.

It is an arithmetic number, because the mean of its divisors is an integer number (198309835).

Almost surely, 2^396619669 is an apocalyptic number.

It is an amenable number.

396619669 is a deficient number, since it is larger than the sum of its proper divisors (1).

396619669 is an equidigital number, since it uses as much as digits as its factorization.

396619669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2834352, while the sum is 55.

The square root of 396619669 is about 19915.3124253676. The cubic root of 396619669 is about 734.7248844633.

The spelling of 396619669 in words is "three hundred ninety-six million, six hundred nineteen thousand, six hundred sixty-nine".