8160989 has 2 divisors, whose sum is σ = 8160990. Its totient is φ = 8160988.

The previous prime is 8160961. The next prime is 8160991. The reversal of 8160989 is 9890618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7022500 + 1138489 = 2650^2 + 1067^2 .

It is a cyclic number.

It is not a de Polignac number, because 8160989 - 2¹² = 8156893 is a prime.

Together with 8160991, 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 (8160959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080494 + 4080495.

It is an arithmetic number, because the mean of its divisors is an integer number (4080495).

Almost surely, 2^8160989 is an apocalyptic number.

It is an amenable number.

8160989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8160989 is an equidigital number, since it uses as much as digits as its factorization.

8160989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 8160989 is about 2856.7444757976. The cubic root of 8160989 is about 201.3326751607.

The spelling of 8160989 in words is "eight million, one hundred sixty thousand, nine hundred eighty-nine".