397838423 has 2 divisors, whose sum is σ = 397838424. Its totient is φ = 397838422.

The previous prime is 397838417. The next prime is 397838431. The reversal of 397838423 is 324838793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397838423 - 2⁸ = 397838167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397838453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198919211 + 198919212.

It is an arithmetic number, because the mean of its divisors is an integer number (198919212).

Almost surely, 2^397838423 is an apocalyptic number.

397838423 is a deficient number, since it is larger than the sum of its proper divisors (1).

397838423 is an equidigital number, since it uses as much as digits as its factorization.

397838423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 47.

The square root of 397838423 is about 19945.8873705834. The cubic root of 397838423 is about 735.4766821594.

The spelling of 397838423 in words is "three hundred ninety-seven million, eight hundred thirty-eight thousand, four hundred twenty-three".