81896875 has 24 divisors (see below), whose sum is σ = 104055840. Its totient is φ = 64440000.

The previous prime is 81896869. The next prime is 81896909. The reversal of 81896875 is 57869818.

It is not a de Polignac number, because 81896875 - 2⁹ = 81896363 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227946 + ... + 228304.

It is an arithmetic number, because the mean of its divisors is an integer number (4335660).

Almost surely, 2^81896875 is an apocalyptic number.

81896875 is a deficient number, since it is larger than the sum of its proper divisors (22158965).

81896875 is an frugal number, since it uses more digits than its factorization.

81896875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 437 counting only the distinct ones).

The product of its digits is 967680, while the sum is 52.

The square root of 81896875 is about 9049.6892211832. The cubic root of 81896875 is about 434.2659483331.

The spelling of 81896875 in words is "eighty-one million, eight hundred ninety-six thousand, eight hundred seventy-five".