491163203 has 2 divisors, whose sum is σ = 491163204. Its totient is φ = 491163202.

The previous prime is 491163181. The next prime is 491163209. The reversal of 491163203 is 302361194.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491163203 is a prime.

It is equal to p_25914530 and since 491163203 and 25914530 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (491163209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245581601 + 245581602.

It is an arithmetic number, because the mean of its divisors is an integer number (245581602).

Almost surely, 2^491163203 is an apocalyptic number.

491163203 is a deficient number, since it is larger than the sum of its proper divisors (1).

491163203 is an equidigital number, since it uses as much as digits as its factorization.

491163203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 491163203 is about 22162.2021243377. The cubic root of 491163203 is about 788.9968589957.

The spelling of 491163203 in words is "four hundred ninety-one million, one hundred sixty-three thousand, two hundred three".