1109046861 has 24 divisors (see below), whose sum is σ = 1726310040. Its totient is φ = 682045056.

The previous prime is 1109046839. The next prime is 1109046907. The reversal of 1109046861 is 1686409011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 383768100 + 725278761 = 19590^2 + 26931^2 .

It is not a de Polignac number, because 1109046861 - 2¹⁰ = 1109045837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109046461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325555 + ... + 328943.

It is an arithmetic number, because the mean of its divisors is an integer number (71929585).

Almost surely, 2^1109046861 is an apocalyptic number.

It is an amenable number.

1109046861 is a deficient number, since it is larger than the sum of its proper divisors (617263179).

1109046861 is a wasteful number, since it uses less digits than its factorization.

1109046861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6205 (or 6202 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1109046861 is about 33302.3551869834. The cubic root of 1109046861 is about 1035.1023605267.

The spelling of 1109046861 in words is "one billion, one hundred nine million, forty-six thousand, eight hundred sixty-one".