917383889 has 2 divisors, whose sum is σ = 917383890. Its totient is φ = 917383888.

The previous prime is 917383871. The next prime is 917383891. The reversal of 917383889 is 988383719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888040000 + 29343889 = 29800^2 + 5417^2 .

It is a cyclic number.

It is not a de Polignac number, because 917383889 - 2²⁴ = 900606673 is a prime.

Together with 917383891, 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 (917383849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458691944 + 458691945.

It is an arithmetic number, because the mean of its divisors is an integer number (458691945).

Almost surely, 2^917383889 is an apocalyptic number.

It is an amenable number.

917383889 is a deficient number, since it is larger than the sum of its proper divisors (1).

917383889 is an equidigital number, since it uses as much as digits as its factorization.

917383889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The square root of 917383889 is about 30288.3457620254. The cubic root of 917383889 is about 971.6660668365. Note that the first 3 decimals are identical.

The spelling of 917383889 in words is "nine hundred seventeen million, three hundred eighty-three thousand, eight hundred eighty-nine".