1813091047 has 2 divisors, whose sum is σ = 1813091048. Its totient is φ = 1813091046.

The previous prime is 1813091041. The next prime is 1813091069. The reversal of 1813091047 is 7401903181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1813091047 - 2¹⁹ = 1812566759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813091041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906545523 + 906545524.

It is an arithmetic number, because the mean of its divisors is an integer number (906545524).

Almost surely, 2^1813091047 is an apocalyptic number.

1813091047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813091047 is an equidigital number, since it uses as much as digits as its factorization.

1813091047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 1813091047 is about 42580.4068439934. The cubic root of 1813091047 is about 1219.3822562378.

The spelling of 1813091047 in words is "one billion, eight hundred thirteen million, ninety-one thousand, forty-seven".