7889149 has 2 divisors, whose sum is σ = 7889150. Its totient is φ = 7889148.

The previous prime is 7889143. The next prime is 7889239. The reversal of 7889149 is 9419887.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4347225 + 3541924 = 2085^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 7889149 - 2⁹ = 7888637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7889099 and 7889108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7889143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3944574 + 3944575.

It is an arithmetic number, because the mean of its divisors is an integer number (3944575).

Almost surely, 2^7889149 is an apocalyptic number.

It is an amenable number.

7889149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7889149 is an equidigital number, since it uses as much as digits as its factorization.

7889149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 7889149 is about 2808.7628949415. The cubic root of 7889149 is about 199.0719418683.

The spelling of 7889149 in words is "seven million, eight hundred eighty-nine thousand, one hundred forty-nine".