8189957 has 2 divisors, whose sum is σ = 8189958. Its totient is φ = 8189956.

The previous prime is 8189947. The next prime is 8189959. The reversal of 8189957 is 7599818.

It is a happy number.

8189957 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5262436 + 2927521 = 2294^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 8189957 - 2⁴ = 8189941 is a prime.

Together with 8189959, 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 (8189959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094978 + 4094979.

It is an arithmetic number, because the mean of its divisors is an integer number (4094979).

Almost surely, 2^8189957 is an apocalyptic number.

It is an amenable number.

8189957 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189957 is an equidigital number, since it uses as much as digits as its factorization.

8189957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 47.

The square root of 8189957 is about 2861.8100915330. The cubic root of 8189957 is about 201.5706086556.

The spelling of 8189957 in words is "eight million, one hundred eighty-nine thousand, nine hundred fifty-seven".