82490881 has 4 divisors (see below), whose sum is σ = 89990064. Its totient is φ = 74991700.

The previous prime is 82490867. The next prime is 82490887. The reversal of 82490881 is 18809428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82490881 - 2⁷ = 82490753 is a prime.

It is a super-2 number, since 2×82490881² = 13609490896312322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82490887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3749575 + ... + 3749596.

It is an arithmetic number, because the mean of its divisors is an integer number (22497516).

Almost surely, 2^82490881 is an apocalyptic number.

It is an amenable number.

82490881 is a deficient number, since it is larger than the sum of its proper divisors (7499183).

82490881 is a wasteful number, since it uses less digits than its factorization.

82490881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499182.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 82490881 is about 9082.4490639915. The cubic root of 82490881 is about 435.3133444984.

The spelling of 82490881 in words is "eighty-two million, four hundred ninety thousand, eight hundred eighty-one".