1109397 has 16 divisors (see below), whose sum is σ = 1556480. Its totient is φ = 702000.

The previous prime is 1109393. The next prime is 1109399. The reversal of 1109397 is 7939011.

It is not a de Polignac number, because 1109397 - 2² = 1109393 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1109397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7272 + ... + 7422.

It is an arithmetic number, because the mean of its divisors is an integer number (97280).

2^1109397 is an apocalyptic number.

It is an amenable number.

1109397 is a deficient number, since it is larger than the sum of its proper divisors (447083).

1109397 is a wasteful number, since it uses less digits than its factorization.

1109397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1109397 is about 1053.2791652739. The cubic root of 1109397 is about 103.5211280352.

The spelling of 1109397 in words is "one million, one hundred nine thousand, three hundred ninety-seven".