1109399 has 2 divisors, whose sum is σ = 1109400. Its totient is φ = 1109398.

The previous prime is 1109393. The next prime is 1109401. The reversal of 1109399 is 9939011.

It is a strong prime.

It is an emirp because it is prime and its reverse (9939011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1109399 is a prime.

It is a super-2 number, since 2×1109399² = 2461532282402, which contains 22 as substring.

Together with 1109401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554699 + 554700.

It is an arithmetic number, because the mean of its divisors is an integer number (554700).

2^1109399 is an apocalyptic number.

1109399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109399 is an equidigital number, since it uses as much as digits as its factorization.

1109399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1109399 is about 1053.2801146893. The cubic root of 1109399 is about 103.5211902438.

The spelling of 1109399 in words is "one million, one hundred nine thousand, three hundred ninety-nine".