109656791 has 2 divisors, whose sum is σ = 109656792. Its totient is φ = 109656790.

The previous prime is 109656779. The next prime is 109656793. The reversal of 109656791 is 197656901.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109656791 - 2¹⁴ = 109640407 is a prime.

It is a super-2 number, since 2×109656791² = 24049223624835362, which contains 22 as substring.

Together with 109656793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109656793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54828395 + 54828396.

It is an arithmetic number, because the mean of its divisors is an integer number (54828396).

Almost surely, 2^109656791 is an apocalyptic number.

109656791 is a deficient number, since it is larger than the sum of its proper divisors (1).

109656791 is an equidigital number, since it uses as much as digits as its factorization.

109656791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 109656791 is about 10471.7138520874. The cubic root of 109656791 is about 478.6431458063.

The spelling of 109656791 in words is "one hundred nine million, six hundred fifty-six thousand, seven hundred ninety-one".