8081819 has 4 divisors (see below), whose sum is σ = 8109696. Its totient is φ = 8053944.

The previous prime is 8081813. The next prime is 8081833. The reversal of 8081819 is 9181808.

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

It is a cyclic number.

It is not a de Polignac number, because 8081819 - 2⁴ = 8081803 is a prime.

It is a super-2 number, since 2×8081819² = 130631596697522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8081813) 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, 13499 + ... + 14084.

It is an arithmetic number, because the mean of its divisors is an integer number (2027424).

Almost surely, 2^8081819 is an apocalyptic number.

8081819 is a deficient number, since it is larger than the sum of its proper divisors (27877).

8081819 is a wasteful number, since it uses less digits than its factorization.

8081819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27876.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 8081819 is about 2842.8540236882. The cubic root of 8081819 is about 200.6795136911.

The spelling of 8081819 in words is "eight million, eighty-one thousand, eight hundred nineteen".