1089109901 has 4 divisors (see below), whose sum is σ = 1188119904. Its totient is φ = 990099900.

The previous prime is 1089109883. The next prime is 1089109951. The reversal of 1089109901 is 1099019801.

It is a happy number.

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 1089109901 - 2²² = 1084915597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089109951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49504985 + ... + 49505006.

It is an arithmetic number, because the mean of its divisors is an integer number (297029976).

Almost surely, 2^1089109901 is an apocalyptic number.

1089109901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1089109901 is a deficient number, since it is larger than the sum of its proper divisors (99010003).

1089109901 is an equidigital number, since it uses as much as digits as its factorization.

1089109901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99010002.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 1089109901 is about 33001.6651246570. The cubic root of 1089109901 is about 1028.8622561309.

It can be divided in two parts, 108910 and 9901, that added together give a palindrome (118811).

The spelling of 1089109901 in words is "one billion, eighty-nine million, one hundred nine thousand, nine hundred one".