109249749 has 16 divisors (see below), whose sum is σ = 184973440. Its totient is φ = 62428320.

The previous prime is 109249741. The next prime is 109249771. The reversal of 109249749 is 947942901.

It is a happy number.

It is not a de Polignac number, because 109249749 - 2³ = 109249741 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 (109249741) 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 15 ways as a sum of consecutive naturals, for example, 288832 + ... + 289209.

It is an arithmetic number, because the mean of its divisors is an integer number (11560840).

Almost surely, 2^109249749 is an apocalyptic number.

It is an amenable number.

109249749 is a deficient number, since it is larger than the sum of its proper divisors (75723691).

109249749 is an equidigital number, since it uses as much as digits as its factorization.

109249749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578057 (or 578051 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 109249749 is about 10452.2604732182. The cubic root of 109249749 is about 478.0501762188.

The spelling of 109249749 in words is "one hundred nine million, two hundred forty-nine thousand, seven hundred forty-nine".