81874023 has 32 divisors (see below), whose sum is σ = 144115200. Its totient is φ = 40028160.

The previous prime is 81874019. The next prime is 81874031. The reversal of 81874023 is 32047818.

It is not a de Polignac number, because 81874023 - 2² = 81874019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81874073) 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 31 ways as a sum of consecutive naturals, for example, 6498 + ... + 14351.

It is an arithmetic number, because the mean of its divisors is an integer number (4503600).

Almost surely, 2^81874023 is an apocalyptic number.

81874023 is a deficient number, since it is larger than the sum of its proper divisors (62241177).

81874023 is a wasteful number, since it uses less digits than its factorization.

81874023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20887.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 81874023 is about 9048.4265483011. The cubic root of 81874023 is about 434.2255529430.

The spelling of 81874023 in words is "eighty-one million, eight hundred seventy-four thousand, twenty-three".