109519 has 2 divisors, whose sum is σ = 109520. Its totient is φ = 109518.

The previous prime is 109517. The next prime is 109537. The reversal of 109519 is 915901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109519 - 2¹ = 109517 is a prime.

It is a super-2 number, since 2×109519² = 23988822722, which contains 22 as substring.

Together with 109517, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 109493 and 109502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54759 + 54760.

It is an arithmetic number, because the mean of its divisors is an integer number (54760).

2¹⁰⁹⁵¹⁹ is an apocalyptic number.

109519 is a deficient number, since it is larger than the sum of its proper divisors (1).

109519 is an equidigital number, since it uses as much as digits as its factorization.

109519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 109519 is about 330.9365498098. The cubic root of 109519 is about 47.8442579533.

The spelling of 109519 in words is "one hundred nine thousand, five hundred nineteen".