109181497 has 4 divisors (see below), whose sum is σ = 115603956. Its totient is φ = 102759040.

The previous prime is 109181459. The next prime is 109181539. The reversal of 109181497 is 794181901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794181901 = 31 ⋅25618771.

It can be written as a sum of positive squares in 2 ways, for example, as 64705936 + 44475561 = 8044^2 + 6669^2 .

It is a cyclic number.

It is not a de Polignac number, because 109181497 - 2²³ = 100792889 is a prime.

It is a super-2 number, since 2×109181497² = 23841198574322018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109181417) 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, 3211204 + ... + 3211237.

It is an arithmetic number, because the mean of its divisors is an integer number (28900989).

Almost surely, 2^109181497 is an apocalyptic number.

109181497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

109181497 is a deficient number, since it is larger than the sum of its proper divisors (6422459).

109181497 is an equidigital number, since it uses as much as digits as its factorization.

109181497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422458.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 109181497 is about 10448.9950234460. The cubic root of 109181497 is about 477.9506041287.

The spelling of 109181497 in words is "one hundred nine million, one hundred eighty-one thousand, four hundred ninety-seven".