1103440391 has 2 divisors, whose sum is σ = 1103440392. Its totient is φ = 1103440390.

The previous prime is 1103440279. The next prime is 1103440397. The reversal of 1103440391 is 1930443011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1103440391 - 2¹⁰ = 1103439367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1103440391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103440397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551720195 + 551720196.

It is an arithmetic number, because the mean of its divisors is an integer number (551720196).

Almost surely, 2^1103440391 is an apocalyptic number.

1103440391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103440391 is an equidigital number, since it uses as much as digits as its factorization.

1103440391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1103440391 is about 33218.0732583935. The cubic root of 1103440391 is about 1033.3551915483.

The spelling of 1103440391 in words is "one billion, one hundred three million, four hundred forty thousand, three hundred ninety-one".