109619149 has 4 divisors (see below), whose sum is σ = 110015164. Its totient is φ = 109223136.

The previous prime is 109619143. The next prime is 109619171. The reversal of 109619149 is 941916901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941916901 = 53 ⋅17772017.

It can be written as a sum of positive squares in 2 ways, for example, as 31561924 + 78057225 = 5618^2 + 8835^2 .

It is a cyclic number.

It is not a de Polignac number, because 109619149 - 2³ = 109619141 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 (109619141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197592 + ... + 198145.

It is an arithmetic number, because the mean of its divisors is an integer number (27503791).

Almost surely, 2^109619149 is an apocalyptic number.

It is an amenable number.

109619149 is a deficient number, since it is larger than the sum of its proper divisors (396015).

109619149 is an equidigital number, since it uses as much as digits as its factorization.

109619149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396014.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 109619149 is about 10469.9163797998. The cubic root of 109619149 is about 478.5883714291.

The spelling of 109619149 in words is "one hundred nine million, six hundred nineteen thousand, one hundred forty-nine".