1109947 has 8 divisors (see below), whose sum is σ = 1188000. Its totient is φ = 1033344.

The previous prime is 1109921. The next prime is 1109951. The reversal of 1109947 is 7499011.

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 1109947 - 2¹⁵ = 1077179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109987) 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, 1554 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (148500).

2^1109947 is an apocalyptic number.

1109947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1109947 is a deficient number, since it is larger than the sum of its proper divisors (78053).

1109947 is a wasteful number, since it uses less digits than its factorization.

1109947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1109947 is about 1053.5402222981. The cubic root of 1109947 is about 103.5382325866.

The spelling of 1109947 in words is "one million, one hundred nine thousand, nine hundred forty-seven".