1081801829 has 8 divisors (see below), whose sum is σ = 1086163320. Its totient is φ = 1077448896.

The previous prime is 1081801807. The next prime is 1081801837. The reversal of 1081801829 is 9281081801.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 580713604 + 501088225 = 24098^2 + 22385^2 .

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 1081801829 - 2¹² = 1081797733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1081801792 and 1081801801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081801859) 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, 370427 + ... + 373335.

It is an arithmetic number, because the mean of its divisors is an integer number (135770415).

Almost surely, 2^1081801829 is an apocalyptic number.

It is an amenable number.

1081801829 is a deficient number, since it is larger than the sum of its proper divisors (4361491).

1081801829 is an equidigital number, since it uses as much as digits as its factorization.

1081801829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279.

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 1081801829 is about 32890.7559809744. The cubic root of 1081801829 is about 1026.5558221511. Note that the first 3 decimals are identical.

The spelling of 1081801829 in words is "one billion, eighty-one million, eight hundred one thousand, eight hundred twenty-nine".