1103971643 has 4 divisors (see below), whose sum is σ = 1104052488. Its totient is φ = 1103890800.

The previous prime is 1103971621. The next prime is 1103971651. The reversal of 1103971643 is 3461793011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1103971643 - 2³⁰ = 30229819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103971943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14321 + ... + 49122.

It is an arithmetic number, because the mean of its divisors is an integer number (276013122).

Almost surely, 2^1103971643 is an apocalyptic number.

1103971643 is a deficient number, since it is larger than the sum of its proper divisors (80845).

1103971643 is an equidigital number, since it uses as much as digits as its factorization.

1103971643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80844.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 1103971643 is about 33226.0687262276. The cubic root of 1103971643 is about 1033.5210014217.

The spelling of 1103971643 in words is "one billion, one hundred three million, nine hundred seventy-one thousand, six hundred forty-three".