81098441 has 4 divisors (see below), whose sum is σ = 85366800. Its totient is φ = 76830084.

The previous prime is 81098431. The next prime is 81098447. The reversal of 81098441 is 14489018.

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 81098441 - 2⁶ = 81098377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81098447) 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, 2134151 + ... + 2134188.

It is an arithmetic number, because the mean of its divisors is an integer number (21341700).

Almost surely, 2^81098441 is an apocalyptic number.

It is an amenable number.

81098441 is a deficient number, since it is larger than the sum of its proper divisors (4268359).

81098441 is a wasteful number, since it uses less digits than its factorization.

81098441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268358.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 81098441 is about 9005.4672838226. The cubic root of 81098441 is about 432.8500797503.

The spelling of 81098441 in words is "eighty-one million, ninety-eight thousand, four hundred forty-one".