823087881 has 24 divisors (see below), whose sum is σ = 1482272064. Its totient is φ = 427577760.

The previous prime is 823087841. The next prime is 823087883. The reversal of 823087881 is 188780328.

It is a happy number.

It is not a de Polignac number, because 823087881 - 2¹⁴ = 823071497 is a prime.

It is a super-2 number, since 2×823087881² = 1354947319698140322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (823087883) 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 23 ways as a sum of consecutive naturals, for example, 593166 + ... + 594551.

It is an arithmetic number, because the mean of its divisors is an integer number (61761336).

Almost surely, 2^823087881 is an apocalyptic number.

It is an amenable number.

823087881 is a deficient number, since it is larger than the sum of its proper divisors (659184183).

823087881 is a wasteful number, since it uses less digits than its factorization.

823087881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187741 (or 1187738 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 823087881 is about 28689.5082042199. The cubic root of 823087881 is about 937.1635793437.

The spelling of 823087881 in words is "eight hundred twenty-three million, eighty-seven thousand, eight hundred eighty-one".