1089903195 has 20 divisors (see below), whose sum is σ = 1953753120. Its totient is φ = 581281488.

The previous prime is 1089903187. The next prime is 1089903209. The reversal of 1089903195 is 5913099801.

It is not a de Polignac number, because 1089903195 - 2³ = 1089903187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1089903195.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1345155 + ... + 1345964.

It is an arithmetic number, because the mean of its divisors is an integer number (97687656).

Almost surely, 2^1089903195 is an apocalyptic number.

1089903195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1089903195 is a deficient number, since it is larger than the sum of its proper divisors (863849925).

1089903195 is an equidigital number, since it uses as much as digits as its factorization.

1089903195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691136 (or 2691127 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 1089903195 is about 33013.6819364336. The cubic root of 1089903195 is about 1029.1119989611. Note that the first 3 decimals are identical.

The spelling of 1089903195 in words is "one billion, eighty-nine million, nine hundred three thousand, one hundred ninety-five".