1911317 has 2 divisors, whose sum is σ = 1911318. Its totient is φ = 1911316.

The previous prime is 1911311. The next prime is 1911319. The reversal of 1911317 is 7131191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1552516 + 358801 = 1246^2 + 599^2 .

It is an emirp because it is prime and its reverse (7131191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1911317 - 2⁶ = 1911253 is a prime.

Together with 1911319, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₁₄₂₈₁₇ and since 1911317 and 142817 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1911292 and 1911301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1911311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 955658 + 955659.

It is an arithmetic number, because the mean of its divisors is an integer number (955659).

2^1911317 is an apocalyptic number.

It is an amenable number.

1911317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1911317 is an equidigital number, since it uses as much as digits as its factorization.

1911317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189, while the sum is 23.

The square root of 1911317 is about 1382.5038878788. The cubic root of 1911317 is about 124.1016552805.

The spelling of 1911317 in words is "one million, nine hundred eleven thousand, three hundred seventeen".