109691791 has 8 divisors (see below), whose sum is σ = 122898384. Its totient is φ = 97024320.

The previous prime is 109691783. The next prime is 109691801. The reversal of 109691791 is 197196901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109691791 - 2³ = 109691783 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 (109691741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134350 + ... + 135163.

It is an arithmetic number, because the mean of its divisors is an integer number (15362298).

Almost surely, 2^109691791 is an apocalyptic number.

109691791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

109691791 is a deficient number, since it is larger than the sum of its proper divisors (13206593).

109691791 is a wasteful number, since it uses less digits than its factorization.

109691791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269561.

The product of its (nonzero) digits is 30618, while the sum is 43.

The square root of 109691791 is about 10473.3848874182. The cubic root of 109691791 is about 478.6940644587.

The spelling of 109691791 in words is "one hundred nine million, six hundred ninety-one thousand, seven hundred ninety-one".