811986423 has 16 divisors (see below), whose sum is σ = 1118148480. Its totient is φ = 523738656.

The previous prime is 811986403. The next prime is 811986517. The reversal of 811986423 is 324689118.

It is not a de Polignac number, because 811986423 - 2¹³ = 811978231 is a prime.

It is a super-2 number, since 2×811986423² = 1318643902272669858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811986403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565 + ... + 40302.

It is an arithmetic number, because the mean of its divisors is an integer number (69884280).

Almost surely, 2^811986423 is an apocalyptic number.

811986423 is a deficient number, since it is larger than the sum of its proper divisors (306162057).

811986423 is a wasteful number, since it uses less digits than its factorization.

811986423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41086.

The product of its digits is 82944, while the sum is 42.

The square root of 811986423 is about 28495.3754669069. The cubic root of 811986423 is about 932.9311393665.

The spelling of 811986423 in words is "eight hundred eleven million, nine hundred eighty-six thousand, four hundred twenty-three".