109391990417 has 2 divisors, whose sum is σ = 109391990418. Its totient is φ = 109391990416.

The previous prime is 109391990399. The next prime is 109391990419. The reversal of 109391990417 is 714099193901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59437952401 + 49954038016 = 243799^2 + 223504^2 .

It is a cyclic number.

It is not a de Polignac number, because 109391990417 - 2¹⁸ = 109391728273 is a prime.

Together with 109391990419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109391990419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54695995208 + 54695995209.

It is an arithmetic number, because the mean of its divisors is an integer number (54695995209).

Almost surely, 2^109391990417 is an apocalyptic number.

It is an amenable number.

109391990417 is a deficient number, since it is larger than the sum of its proper divisors (1).

109391990417 is an equidigital number, since it uses as much as digits as its factorization.

109391990417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 53.

The spelling of 109391990417 in words is "one hundred nine billion, three hundred ninety-one million, nine hundred ninety thousand, four hundred seventeen".