396212813 has 2 divisors, whose sum is σ = 396212814. Its totient is φ = 396212812.

The previous prime is 396212759. The next prime is 396212827. The reversal of 396212813 is 318212693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364886404 + 31326409 = 19102^2 + 5597^2 .

It is a cyclic number.

It is not a de Polignac number, because 396212813 - 2¹⁴ = 396196429 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 (396217813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198106406 + 198106407.

It is an arithmetic number, because the mean of its divisors is an integer number (198106407).

Almost surely, 2^396212813 is an apocalyptic number.

It is an amenable number.

396212813 is a deficient number, since it is larger than the sum of its proper divisors (1).

396212813 is an equidigital number, since it uses as much as digits as its factorization.

396212813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 396212813 is about 19905.0951517444. The cubic root of 396212813 is about 734.4735693930.

The spelling of 396212813 in words is "three hundred ninety-six million, two hundred twelve thousand, eight hundred thirteen".