1922871917 has 2 divisors, whose sum is σ = 1922871918. Its totient is φ = 1922871916.

The previous prime is 1922871823. The next prime is 1922871919. The reversal of 1922871917 is 7191782291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906719556 + 16152361 = 43666^2 + 4019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1922871917 - 2¹⁰ = 1922870893 is a prime.

Together with 1922871919, 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 (1922871919) 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, 961435958 + 961435959.

It is an arithmetic number, because the mean of its divisors is an integer number (961435959).

Almost surely, 2^1922871917 is an apocalyptic number.

It is an amenable number.

1922871917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1922871917 is an equidigital number, since it uses as much as digits as its factorization.

1922871917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 47.

The square root of 1922871917 is about 43850.5634741448. The cubic root of 1922871917 is about 1243.5123960077.

The spelling of 1922871917 in words is "one billion, nine hundred twenty-two million, eight hundred seventy-one thousand, nine hundred seventeen".