396919999 has 8 divisors (see below), whose sum is σ = 453785760. Its totient is φ = 340094976.

The previous prime is 396919987. The next prime is 396920003. The reversal of 396919999 is 999919693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 396919999 - 2²¹ = 394822847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396919999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396919909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14787 + ... + 31819.

It is an arithmetic number, because the mean of its divisors is an integer number (56723220).

Almost surely, 2^396919999 is an apocalyptic number.

396919999 is a deficient number, since it is larger than the sum of its proper divisors (56865761).

396919999 is a wasteful number, since it uses less digits than its factorization.

396919999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20369.

The product of its digits is 9565938, while the sum is 64.

The square root of 396919999 is about 19922.8511764757. The cubic root of 396919999 is about 734.9102881543.

The spelling of 396919999 in words is "three hundred ninety-six million, nine hundred nineteen thousand, nine hundred ninety-nine".