397028111 has 2 divisors, whose sum is σ = 397028112. Its totient is φ = 397028110.

The previous prime is 397028053. The next prime is 397028113. The reversal of 397028111 is 111820793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397028111 is a prime.

Together with 397028113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397028113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198514055 + 198514056.

It is an arithmetic number, because the mean of its divisors is an integer number (198514056).

Almost surely, 2^397028111 is an apocalyptic number.

397028111 is a deficient number, since it is larger than the sum of its proper divisors (1).

397028111 is an equidigital number, since it uses as much as digits as its factorization.

397028111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 397028111 is about 19925.5642580079. The cubic root of 397028111 is about 734.9770063919.

The spelling of 397028111 in words is "three hundred ninety-seven million, twenty-eight thousand, one hundred eleven".