109519919 has 2 divisors, whose sum is σ = 109519920. Its totient is φ = 109519918.

The previous prime is 109519909. The next prime is 109519981. The reversal of 109519919 is 919915901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109519919 - 2¹² = 109515823 is a prime.

It is a super-2 number, since 2×109519919² = 23989225315533122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 109519919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109519909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54759959 + 54759960.

It is an arithmetic number, because the mean of its divisors is an integer number (54759960).

Almost surely, 2^109519919 is an apocalyptic number.

109519919 is a deficient number, since it is larger than the sum of its proper divisors (1).

109519919 is an equidigital number, since it uses as much as digits as its factorization.

109519919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32805, while the sum is 44.

The square root of 109519919 is about 10465.1764915839. The cubic root of 109519919 is about 478.4439177713.

The spelling of 109519919 in words is "one hundred nine million, five hundred nineteen thousand, nine hundred nineteen".