1103891729 has 2 divisors, whose sum is σ = 1103891730. Its totient is φ = 1103891728.

The previous prime is 1103891717. The next prime is 1103891731. The reversal of 1103891729 is 9271983011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1033751104 + 70140625 = 32152^2 + 8375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103891729 is a prime.

Together with 1103891731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1103891429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551945864 + 551945865.

It is an arithmetic number, because the mean of its divisors is an integer number (551945865).

Almost surely, 2^1103891729 is an apocalyptic number.

It is an amenable number.

1103891729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103891729 is an equidigital number, since it uses as much as digits as its factorization.

1103891729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 1103891729 is about 33224.8661246362. The cubic root of 1103891729 is about 1033.4960627406.

The spelling of 1103891729 in words is "one billion, one hundred three million, eight hundred ninety-one thousand, seven hundred twenty-nine".