811677897 has 24 divisors (see below), whose sum is σ = 1220356800. Its totient is φ = 519226848.

The previous prime is 811677871. The next prime is 811677899. The reversal of 811677897 is 798776118.

It is not a de Polignac number, because 811677897 - 2¹² = 811673801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (811677899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33004 + ... + 52082.

It is an arithmetic number, because the mean of its divisors is an integer number (50848200).

Almost surely, 2^811677897 is an apocalyptic number.

811677897 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

811677897 is a deficient number, since it is larger than the sum of its proper divisors (408678903).

811677897 is a wasteful number, since it uses less digits than its factorization.

811677897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19277 (or 19274 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 54.

The square root of 811677897 is about 28489.9613372851. The cubic root of 811677897 is about 932.8129641657.

The spelling of 811677897 in words is "eight hundred eleven million, six hundred seventy-seven thousand, eight hundred ninety-seven".