398363863 has 4 divisors (see below), whose sum is σ = 398457208. Its totient is φ = 398270520.

The previous prime is 398363837. The next prime is 398363879. The reversal of 398363863 is 368363893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368363893 = 3539 ⋅104087.

It is a cyclic number.

It is not a de Polignac number, because 398363863 - 2²¹ = 396266711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398363893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39948 + ... + 48913.

It is an arithmetic number, because the mean of its divisors is an integer number (99614302).

Almost surely, 2^398363863 is an apocalyptic number.

398363863 is a deficient number, since it is larger than the sum of its proper divisors (93345).

398363863 is an equidigital number, since it uses as much as digits as its factorization.

398363863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93344.

The product of its digits is 1679616, while the sum is 49.

The square root of 398363863 is about 19959.0546619824. The cubic root of 398363863 is about 735.8003301848.

The spelling of 398363863 in words is "three hundred ninety-eight million, three hundred sixty-three thousand, eight hundred sixty-three".