1081909819 has 8 divisors (see below), whose sum is σ = 1096297920. Its totient is φ = 1067539200.

The previous prime is 1081909753. The next prime is 1081909823. The reversal of 1081909819 is 9189091801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1081909819 - 2⁹ = 1081909307 is a prime.

It is a super-2 number, since 2×1081909819² = 2341057712897225522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081909319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161109 + ... + 167689.

It is an arithmetic number, because the mean of its divisors is an integer number (137037240).

Almost surely, 2^1081909819 is an apocalyptic number.

1081909819 is a deficient number, since it is larger than the sum of its proper divisors (14388101).

1081909819 is an equidigital number, since it uses as much as digits as its factorization.

1081909819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741.

The product of its (nonzero) digits is 46656, while the sum is 46.

The square root of 1081909819 is about 32892.3975866765. The cubic root of 1081909819 is about 1026.5899793851.

The spelling of 1081909819 in words is "one billion, eighty-one million, nine hundred nine thousand, eight hundred nineteen".