397052213 has 2 divisors, whose sum is σ = 397052214. Its totient is φ = 397052212.

The previous prime is 397052209. The next prime is 397052261. The reversal of 397052213 is 312250793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216472369 + 180579844 = 14713^2 + 13438^2 .

It is a cyclic number.

It is not a de Polignac number, because 397052213 - 2² = 397052209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397052213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397052263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198526106 + 198526107.

It is an arithmetic number, because the mean of its divisors is an integer number (198526107).

Almost surely, 2^397052213 is an apocalyptic number.

It is an amenable number.

397052213 is a deficient number, since it is larger than the sum of its proper divisors (1).

397052213 is an equidigital number, since it uses as much as digits as its factorization.

397052213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 397052213 is about 19926.1690497697. The cubic root of 397052213 is about 734.9918786028.

The spelling of 397052213 in words is "three hundred ninety-seven million, fifty-two thousand, two hundred thirteen".