398216263 has 2 divisors, whose sum is σ = 398216264. Its totient is φ = 398216262.

The previous prime is 398216261. The next prime is 398216281. The reversal of 398216263 is 362612893.

It is a weak prime.

It is an emirp because it is prime and its reverse (362612893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398216263 - 2¹ = 398216261 is a prime.

Together with 398216261, 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 (398216261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199108131 + 199108132.

It is an arithmetic number, because the mean of its divisors is an integer number (199108132).

Almost surely, 2^398216263 is an apocalyptic number.

398216263 is a deficient number, since it is larger than the sum of its proper divisors (1).

398216263 is an equidigital number, since it uses as much as digits as its factorization.

398216263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 398216263 is about 19955.3567495046. The cubic root of 398216263 is about 735.7094438078.

The spelling of 398216263 in words is "three hundred ninety-eight million, two hundred sixteen thousand, two hundred sixty-three".