109868819 has 2 divisors, whose sum is σ = 109868820. Its totient is φ = 109868818.

The previous prime is 109868813. The next prime is 109868831. The reversal of 109868819 is 918868901.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (918868901) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109868819 is a prime.

It is a super-2 number, since 2×109868819² = 24142314776909522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109868813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54934409 + 54934410.

It is an arithmetic number, because the mean of its divisors is an integer number (54934410).

Almost surely, 2^109868819 is an apocalyptic number.

109868819 is a deficient number, since it is larger than the sum of its proper divisors (1).

109868819 is an equidigital number, since it uses as much as digits as its factorization.

109868819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 109868819 is about 10481.8328072909. The cubic root of 109868819 is about 478.9514422907.

The spelling of 109868819 in words is "one hundred nine million, eight hundred sixty-eight thousand, eight hundred nineteen".