109195749 has 16 divisors (see below), whose sum is σ = 174216000. Its totient is φ = 67197168.

The previous prime is 109195661. The next prime is 109195753. The reversal of 109195749 is 947591901.

It is not a de Polignac number, because 109195749 - 2¹³ = 109187557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109195349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155199 + ... + 155900.

It is an arithmetic number, because the mean of its divisors is an integer number (10888500).

Almost surely, 2^109195749 is an apocalyptic number.

It is an amenable number.

109195749 is a deficient number, since it is larger than the sum of its proper divisors (65020251).

109195749 is a wasteful number, since it uses less digits than its factorization.

109195749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311121 (or 311115 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 109195749 is about 10449.6769806535. The cubic root of 109195749 is about 477.9713996415.

The spelling of 109195749 in words is "one hundred nine million, one hundred ninety-five thousand, seven hundred forty-nine".