19116917 has 2 divisors, whose sum is σ = 19116918. Its totient is φ = 19116916.

The previous prime is 19116899. The next prime is 19116919. The reversal of 19116917 is 71961191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19018321 + 98596 = 4361^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 19116917 - 2⁸ = 19116661 is a prime.

Together with 19116919, 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 (19116919) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9558458 + 9558459.

It is an arithmetic number, because the mean of its divisors is an integer number (9558459).

Almost surely, 2^19116917 is an apocalyptic number.

It is an amenable number.

19116917 is a deficient number, since it is larger than the sum of its proper divisors (1).

19116917 is an equidigital number, since it uses as much as digits as its factorization.

19116917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 35.

The square root of 19116917 is about 4372.2896747585. The cubic root of 19116917 is about 267.3863820046.

The spelling of 19116917 in words is "nineteen million, one hundred sixteen thousand, nine hundred seventeen".