396278879 has 2 divisors, whose sum is σ = 396278880. Its totient is φ = 396278878.

The previous prime is 396278791. The next prime is 396278947. The reversal of 396278879 is 978872693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396278879 - 2¹⁶ = 396213343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396275879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198139439 + 198139440.

It is an arithmetic number, because the mean of its divisors is an integer number (198139440).

Almost surely, 2^396278879 is an apocalyptic number.

396278879 is a deficient number, since it is larger than the sum of its proper divisors (1).

396278879 is an equidigital number, since it uses as much as digits as its factorization.

396278879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 59.

The square root of 396278879 is about 19906.7546074191. The cubic root of 396278879 is about 734.5143900770.

The spelling of 396278879 in words is "three hundred ninety-six million, two hundred seventy-eight thousand, eight hundred seventy-nine".