818834491 has 2 divisors, whose sum is σ = 818834492. Its totient is φ = 818834490.

The previous prime is 818834479. The next prime is 818834557. The reversal of 818834491 is 194438818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818834491 - 2²⁹ = 281963579 is a prime.

It is not a weakly prime, because it can be changed into another prime (818831491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409417245 + 409417246.

It is an arithmetic number, because the mean of its divisors is an integer number (409417246).

Almost surely, 2^818834491 is an apocalyptic number.

818834491 is a deficient number, since it is larger than the sum of its proper divisors (1).

818834491 is an equidigital number, since it uses as much as digits as its factorization.

818834491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 46.

The square root of 818834491 is about 28615.2842201506. The cubic root of 818834491 is about 935.5464947450.

The spelling of 818834491 in words is "eight hundred eighteen million, eight hundred thirty-four thousand, four hundred ninety-one".