397941311 has 2 divisors, whose sum is σ = 397941312. Its totient is φ = 397941310.

The previous prime is 397941281. The next prime is 397941329. The reversal of 397941311 is 113149793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397941311 - 2¹⁸ = 397679167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397941211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198970655 + 198970656.

It is an arithmetic number, because the mean of its divisors is an integer number (198970656).

Almost surely, 2^397941311 is an apocalyptic number.

397941311 is a deficient number, since it is larger than the sum of its proper divisors (1).

397941311 is an equidigital number, since it uses as much as digits as its factorization.

397941311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 397941311 is about 19948.4663821558. The cubic root of 397941311 is about 735.5400790881.

The spelling of 397941311 in words is "three hundred ninety-seven million, nine hundred forty-one thousand, three hundred eleven".