1093978643 has 2 divisors, whose sum is σ = 1093978644. Its totient is φ = 1093978642.

The previous prime is 1093978597. The next prime is 1093978681. The reversal of 1093978643 is 3468793901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1093978643 - 2⁸ = 1093978387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1093978591 and 1093978600.

It is not a weakly prime, because it can be changed into another prime (1093978943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546989321 + 546989322.

It is an arithmetic number, because the mean of its divisors is an integer number (546989322).

Almost surely, 2^1093978643 is an apocalyptic number.

1093978643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1093978643 is an equidigital number, since it uses as much as digits as its factorization.

1093978643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 1093978643 is about 33075.3479649119. The cubic root of 1093978643 is about 1030.3931144669.

The spelling of 1093978643 in words is "one billion, ninety-three million, nine hundred seventy-eight thousand, six hundred forty-three".