109287361 has 4 divisors (see below), whose sum is σ = 111612672. Its totient is φ = 106962052.

The previous prime is 109287331. The next prime is 109287379. The reversal of 109287361 is 163782901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163782901 = 1129 ⋅145069.

It is a cyclic number.

It is not a de Polignac number, because 109287361 - 2¹¹ = 109285313 is a prime.

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 109287361.

It is not an unprimeable number, because it can be changed into a prime (109287331) 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 in 3 ways as a sum of consecutive naturals, for example, 1162585 + ... + 1162678.

It is an arithmetic number, because the mean of its divisors is an integer number (27903168).

Almost surely, 2^109287361 is an apocalyptic number.

It is an amenable number.

109287361 is a deficient number, since it is larger than the sum of its proper divisors (2325311).

109287361 is an equidigital number, since it uses as much as digits as its factorization.

109287361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325310.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 109287361 is about 10454.0595464154. The cubic root of 109287361 is about 478.1050302281.

Adding to 109287361 its product of nonzero digits (18144), we get a triangular number (109305505 = T₁₄₇₈₅).

The spelling of 109287361 in words is "one hundred nine million, two hundred eighty-seven thousand, three hundred sixty-one".