397130911 has 2 divisors, whose sum is σ = 397130912. Its totient is φ = 397130910.

The previous prime is 397130891. The next prime is 397130917. The reversal of 397130911 is 119031793.

It is a strong prime.

It is an emirp because it is prime and its reverse (119031793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397130911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397130917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198565455 + 198565456.

It is an arithmetic number, because the mean of its divisors is an integer number (198565456).

Almost surely, 2^397130911 is an apocalyptic number.

397130911 is a deficient number, since it is larger than the sum of its proper divisors (1).

397130911 is an equidigital number, since it uses as much as digits as its factorization.

397130911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 397130911 is about 19928.1436917742. The cubic root of 397130911 is about 735.0404352475.

The spelling of 397130911 in words is "three hundred ninety-seven million, one hundred thirty thousand, nine hundred eleven".