109198742 has 4 divisors (see below), whose sum is σ = 163798116. Its totient is φ = 54599370.

The previous prime is 109198741. The next prime is 109198759. The reversal of 109198742 is 247891901.

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

It is a self number, because there is not a number n which added to its sum of digits gives 109198742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109198741) 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, 27299684 + ... + 27299687.

It is an arithmetic number, because the mean of its divisors is an integer number (40949529).

Almost surely, 2^109198742 is an apocalyptic number.

109198742 is a deficient number, since it is larger than the sum of its proper divisors (54599374).

109198742 is an equidigital number, since it uses as much as digits as its factorization.

109198742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54599373.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 109198742 is about 10449.8201898406. The cubic root of 109198742 is about 477.9757665860.

The spelling of 109198742 in words is "one hundred nine million, one hundred ninety-eight thousand, seven hundred forty-two".