1098159723 has 12 divisors (see below), whose sum is σ = 1586537680. Its totient is φ = 731964816.

The previous prime is 1098159721. The next prime is 1098159781. The reversal of 1098159723 is 3279518901.

It is not a de Polignac number, because 1098159723 - 2¹ = 1098159721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098159721) 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, 60765 + ... + 76737.

Almost surely, 2^1098159723 is an apocalyptic number.

1098159723 is a deficient number, since it is larger than the sum of its proper divisors (488377957).

1098159723 is a wasteful number, since it uses less digits than its factorization.

1098159723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23618 (or 23615 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1098159723 is about 33138.4930707478. The cubic root of 1098159723 is about 1031.7041331183.

The spelling of 1098159723 in words is "one billion, ninety-eight million, one hundred fifty-nine thousand, seven hundred twenty-three".