811909469 has 8 divisors (see below), whose sum is σ = 946833600. Its totient is φ = 695922108.

The previous prime is 811909459. The next prime is 811909487. The reversal of 811909469 is 964909118.

It is a de Polignac number, because none of the positive numbers 2^k-811909469 is a prime.

It is a super-2 number, since 2×811909469² = 1318393971703723922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811909459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183199 + ... + 1183884.

It is an arithmetic number, because the mean of its divisors is an integer number (118354200).

Almost surely, 2^811909469 is an apocalyptic number.

It is an amenable number.

811909469 is a deficient number, since it is larger than the sum of its proper divisors (134924131).

811909469 is an equidigital number, since it uses as much as digits as its factorization.

811909469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367104 (or 2367090 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 811909469 is about 28494.0251456336. The cubic root of 811909469 is about 932.9016663569.

The spelling of 811909469 in words is "eight hundred eleven million, nine hundred nine thousand, four hundred sixty-nine".