109431197 has 4 divisors (see below), whose sum is σ = 109464636. Its totient is φ = 109397760.

The previous prime is 109431151. The next prime is 109431211. The reversal of 109431197 is 791134901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791134901 = 19 ⋅41638679.

It can be written as a sum of positive squares in 2 ways, for example, as 51351556 + 58079641 = 7166^2 + 7621^2 .

It is a cyclic number.

It is not a de Polignac number, because 109431197 - 2¹⁴ = 109414813 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 (109431137) 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, 11204 + ... + 18557.

It is an arithmetic number, because the mean of its divisors is an integer number (27366159).

Almost surely, 2^109431197 is an apocalyptic number.

It is an amenable number.

109431197 is a deficient number, since it is larger than the sum of its proper divisors (33439).

109431197 is an equidigital number, since it uses as much as digits as its factorization.

109431197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33438.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 109431197 is about 10460.9367171396. The cubic root of 109431197 is about 478.3146871884.

The spelling of 109431197 in words is "one hundred nine million, four hundred thirty-one thousand, one hundred ninety-seven".