109142047 has 4 divisors (see below), whose sum is σ = 124733776. Its totient is φ = 93550320.

The previous prime is 109142039. The next prime is 109142069. The reversal of 109142047 is 740241901.

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 109142047 - 2³ = 109142039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109142017) 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 3 ways as a sum of consecutive naturals, for example, 7795854 + ... + 7795867.

It is an arithmetic number, because the mean of its divisors is an integer number (31183444).

Almost surely, 2^109142047 is an apocalyptic number.

109142047 is a deficient number, since it is larger than the sum of its proper divisors (15591729).

109142047 is an equidigital number, since it uses as much as digits as its factorization.

109142047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15591728.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 109142047 is about 10447.1071115405. The cubic root of 109142047 is about 477.8930320331.

Adding to 109142047 its reverse (740241901), we get a palindrome (849383948).

The spelling of 109142047 in words is "one hundred nine million, one hundred forty-two thousand, forty-seven".