1098410091 has 4 divisors (see below), whose sum is σ = 1464546792. Its totient is φ = 732273392.

The previous prime is 1098410087. The next prime is 1098410111. The reversal of 1098410091 is 1900148901.

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

It is a cyclic number.

It is not a de Polignac number, because 1098410091 - 2² = 1098410087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1098410191) 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, 183068346 + ... + 183068351.

It is an arithmetic number, because the mean of its divisors is an integer number (366136698).

Almost surely, 2^1098410091 is an apocalyptic number.

1098410091 is a deficient number, since it is larger than the sum of its proper divisors (366136701).

1098410091 is an equidigital number, since it uses as much as digits as its factorization.

1098410091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366136700.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 1098410091 is about 33142.2704563221. The cubic root of 1098410091 is about 1031.7825327862.

Adding to 1098410091 its reverse (1900148901), we get a palindrome (2998558992).

The spelling of 1098410091 in words is "one billion, ninety-eight million, four hundred ten thousand, ninety-one".