8111919 has 4 divisors (see below), whose sum is σ = 10815896. Its totient is φ = 5407944.

The previous prime is 8111911. The next prime is 8111923. The reversal of 8111919 is 9191118.

It is a happy number.

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

It is not a de Polignac number, because 8111919 - 2³ = 8111911 is a prime.

It is a super-2 number, since 2×8111919² = 131606459725122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8111911) 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, 1351984 + ... + 1351989.

It is an arithmetic number, because the mean of its divisors is an integer number (2703974).

Almost surely, 2^8111919 is an apocalyptic number.

8111919 is a deficient number, since it is larger than the sum of its proper divisors (2703977).

8111919 is a wasteful number, since it uses less digits than its factorization.

8111919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703976.

The product of its digits is 648, while the sum is 30.

The square root of 8111919 is about 2848.1430792711. The cubic root of 8111919 is about 200.9283425665.

The spelling of 8111919 in words is "eight million, one hundred eleven thousand, nine hundred nineteen".