109111813 has 4 divisors (see below), whose sum is σ = 114854560. Its totient is φ = 103369068.

The previous prime is 109111811. The next prime is 109111823. The reversal of 109111813 is 318111901.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318111901 = 1163 ⋅273527.

It is a cyclic number.

It is not a de Polignac number, because 109111813 - 2¹ = 109111811 is a prime.

It is a super-2 number, since 2×109111813² = 23810775472293938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109111811) 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, 2871345 + ... + 2871382.

It is an arithmetic number, because the mean of its divisors is an integer number (28713640).

Almost surely, 2^109111813 is an apocalyptic number.

It is an amenable number.

109111813 is a deficient number, since it is larger than the sum of its proper divisors (5742747).

109111813 is an equidigital number, since it uses as much as digits as its factorization.

109111813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742746.

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 109111813 is about 10445.6600078693. The cubic root of 109111813 is about 477.8489000886.

The spelling of 109111813 in words is "one hundred nine million, one hundred eleven thousand, eight hundred thirteen".