1098875813 has 12 divisors (see below), whose sum is σ = 1286435052. Its totient is φ = 935887680.

The previous prime is 1098875803. The next prime is 1098875819. The reversal of 1098875813 is 3185788901.

It can be written as a sum of positive squares in 2 ways, for example, as 166978084 + 931897729 = 12922^2 + 30527^2 .

It is not a de Polignac number, because 1098875813 - 2²⁶ = 1031766949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098875819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63728 + ... + 79113.

It is an arithmetic number, because the mean of its divisors is an integer number (107202921).

Almost surely, 2^1098875813 is an apocalyptic number.

It is an amenable number.

1098875813 is a deficient number, since it is larger than the sum of its proper divisors (187559239).

1098875813 is a wasteful number, since it uses less digits than its factorization.

1098875813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143012 (or 143005 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 50.

The square root of 1098875813 is about 33149.2958145418. The cubic root of 1098875813 is about 1031.9283362316.

The spelling of 1098875813 in words is "one billion, ninety-eight million, eight hundred seventy-five thousand, eight hundred thirteen".