397802863 has 2 divisors, whose sum is σ = 397802864. Its totient is φ = 397802862.

The previous prime is 397802861. The next prime is 397802887. The reversal of 397802863 is 368208793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397802863 - 2¹ = 397802861 is a prime.

Together with 397802861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397802861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198901431 + 198901432.

It is an arithmetic number, because the mean of its divisors is an integer number (198901432).

Almost surely, 2^397802863 is an apocalyptic number.

397802863 is a deficient number, since it is larger than the sum of its proper divisors (1).

397802863 is an equidigital number, since it uses as much as digits as its factorization.

397802863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 397802863 is about 19944.9959388314. The cubic root of 397802863 is about 735.4547684639.

The spelling of 397802863 in words is "three hundred ninety-seven million, eight hundred two thousand, eight hundred sixty-three".