109287427 has 4 divisors (see below), whose sum is σ = 111953016. Its totient is φ = 106621840.

The previous prime is 109287413. The next prime is 109287443. The reversal of 109287427 is 724782901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109287427 - 2¹⁵ = 109254659 is a prime.

It is a Smith number, since the sum of its digits (40) 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.

It is a self number, because there is not a number n which added to its sum of digits gives 109287427.

It is not an unprimeable number, because it can be changed into a prime (109287527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332733 + ... + 1332814.

It is an arithmetic number, because the mean of its divisors is an integer number (27988254).

Almost surely, 2^109287427 is an apocalyptic number.

109287427 is a deficient number, since it is larger than the sum of its proper divisors (2665589).

109287427 is an equidigital number, since it uses as much as digits as its factorization.

109287427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665588.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 109287427 is about 10454.0627030834. The cubic root of 109287427 is about 478.1051264726.

It can be divided in two parts, 1092874 and 27, that added together give a palindrome (1092901).

The spelling of 109287427 in words is "one hundred nine million, two hundred eighty-seven thousand, four hundred twenty-seven".