1109697839 has 2 divisors, whose sum is σ = 1109697840. Its totient is φ = 1109697838.

The previous prime is 1109697833. The next prime is 1109697931. The reversal of 1109697839 is 9387969011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1109697839 - 2¹² = 1109693743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109697833) 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, 554848919 + 554848920.

It is an arithmetic number, because the mean of its divisors is an integer number (554848920).

Almost surely, 2^1109697839 is an apocalyptic number.

1109697839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109697839 is an equidigital number, since it uses as much as digits as its factorization.

1109697839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 1109697839 is about 33312.1275063602. The cubic root of 1109697839 is about 1035.3048458295.

The spelling of 1109697839 in words is "one billion, one hundred nine million, six hundred ninety-seven thousand, eight hundred thirty-nine".