1098489361 has 4 divisors (see below), whose sum is σ = 1146249792. Its totient is φ = 1050728932.

The previous prime is 1098489341. The next prime is 1098489419. The reversal of 1098489361 is 1639848901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1098489361 - 2⁹ = 1098488849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098489331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23880181 + ... + 23880226.

It is an arithmetic number, because the mean of its divisors is an integer number (286562448).

Almost surely, 2^1098489361 is an apocalyptic number.

It is an amenable number.

1098489361 is a deficient number, since it is larger than the sum of its proper divisors (47760431).

1098489361 is an equidigital number, since it uses as much as digits as its factorization.

1098489361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47760430.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 1098489361 is about 33143.4663395367. The cubic root of 1098489361 is about 1031.8073527311.

The spelling of 1098489361 in words is "one billion, ninety-eight million, four hundred eighty-nine thousand, three hundred sixty-one".