109199245 has 16 divisors (see below), whose sum is σ = 139987440. Its totient is φ = 81485824.

The previous prime is 109199243. The next prime is 109199257. The reversal of 109199245 is 542991901.

It can be written as a sum of positive squares in 8 ways, for example, as 4791721 + 104407524 = 2189^2 + 10218^2 .

It is a cyclic number.

It is not a de Polignac number, because 109199245 - 2¹ = 109199243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109199198 and 109199207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109199243) 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, 3921 + ... + 15289.

It is an arithmetic number, because the mean of its divisors is an integer number (8749215).

Almost surely, 2^109199245 is an apocalyptic number.

It is an amenable number.

109199245 is a deficient number, since it is larger than the sum of its proper divisors (30788195).

109199245 is a wasteful number, since it uses less digits than its factorization.

109199245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11504.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 109199245 is about 10449.8442572126. The cubic root of 109199245 is about 477.9765004816.

It can be divided in two parts, 10919 and 9245, that added together give a square (20164 = 142²).

The spelling of 109199245 in words is "one hundred nine million, one hundred ninety-nine thousand, two hundred forty-five".