1109431 has 2 divisors, whose sum is σ = 1109432. Its totient is φ = 1109430.

The previous prime is 1109411. The next prime is 1109473. The reversal of 1109431 is 1349011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1109431 - 2⁵ = 1109399 is a prime.

It is a super-2 number, since 2×1109431² = 2461674287522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1109399 and 1109408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1109401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554715 + 554716.

It is an arithmetic number, because the mean of its divisors is an integer number (554716).

2^1109431 is an apocalyptic number.

1109431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1109431 is an equidigital number, since it uses as much as digits as its factorization.

1109431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1109431 is about 1053.2953052207. The cubic root of 1109431 is about 103.5221855714.

It can be divided in two parts, 1109 and 431, that added together give a triangular number (1540 = T₅₅).

The spelling of 1109431 in words is "one million, one hundred nine thousand, four hundred thirty-one".