491367803 has 2 divisors, whose sum is σ = 491367804. Its totient is φ = 491367802.

The previous prime is 491367781. The next prime is 491367817. The reversal of 491367803 is 308763194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491367803 - 2¹⁶ = 491302267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491367893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245683901 + 245683902.

It is an arithmetic number, because the mean of its divisors is an integer number (245683902).

Almost surely, 2^491367803 is an apocalyptic number.

491367803 is a deficient number, since it is larger than the sum of its proper divisors (1).

491367803 is an equidigital number, since it uses as much as digits as its factorization.

491367803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 491367803 is about 22166.8176110149. The cubic root of 491367803 is about 789.1063991964.

The spelling of 491367803 in words is "four hundred ninety-one million, three hundred sixty-seven thousand, eight hundred three".