82801889 has 4 divisors (see below), whose sum is σ = 83259540. Its totient is φ = 82344240.

The previous prime is 82801871. The next prime is 82801913. The reversal of 82801889 is 98810828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23203489 + 59598400 = 4817^2 + 7720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82801889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82801489) 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, 228554 + ... + 228915.

It is an arithmetic number, because the mean of its divisors is an integer number (20814885).

Almost surely, 2^82801889 is an apocalyptic number.

It is an amenable number.

82801889 is a deficient number, since it is larger than the sum of its proper divisors (457651).

82801889 is a wasteful number, since it uses less digits than its factorization.

82801889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457650.

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 82801889 is about 9099.5543297460. The cubic root of 82801889 is about 435.8597327455.

The spelling of 82801889 in words is "eighty-two million, eight hundred one thousand, eight hundred eighty-nine".