1108638793 has 2 divisors, whose sum is σ = 1108638794. Its totient is φ = 1108638792.

The previous prime is 1108638787. The next prime is 1108638803. The reversal of 1108638793 is 3978368011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097133129 + 11505664 = 33123^2 + 3392^2 .

It is an emirp because it is prime and its reverse (3978368011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1108638793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1108638703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554319396 + 554319397.

It is an arithmetic number, because the mean of its divisors is an integer number (554319397).

Almost surely, 2^1108638793 is an apocalyptic number.

It is an amenable number.

1108638793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108638793 is an equidigital number, since it uses as much as digits as its factorization.

1108638793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1108638793 is about 33296.2279094795. The cubic root of 1108638793 is about 1034.9753914505.

The spelling of 1108638793 in words is "one billion, one hundred eight million, six hundred thirty-eight thousand, seven hundred ninety-three".