1098913493 has 4 divisors (see below), whose sum is σ = 1105913100. Its totient is φ = 1091913888.

The previous prime is 1098913471. The next prime is 1098913499. The reversal of 1098913493 is 3943198901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 184334929 + 914578564 = 13577^2 + 30242^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098913493 - 2⁶ = 1098913429 is a prime.

It is a super-2 number, since 2×1098913493² = 2415221730194922098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098913499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3499568 + ... + 3499881.

It is an arithmetic number, because the mean of its divisors is an integer number (276478275).

Almost surely, 2^1098913493 is an apocalyptic number.

It is an amenable number.

1098913493 is a deficient number, since it is larger than the sum of its proper divisors (6999607).

1098913493 is an equidigital number, since it uses as much as digits as its factorization.

1098913493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999606.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 1098913493 is about 33149.8641475346. The cubic root of 1098913493 is about 1031.9401308963.

The spelling of 1098913493 in words is "one billion, ninety-eight million, nine hundred thirteen thousand, four hundred ninety-three".