7967989 has 2 divisors, whose sum is σ = 7967990. Its totient is φ = 7967988.

The previous prime is 7967963. The next prime is 7968001. The reversal of 7967989 is 9897697.

7967989 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7535025 + 432964 = 2745^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 7967989 - 2¹¹ = 7965941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7967909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3983994 + 3983995.

It is an arithmetic number, because the mean of its divisors is an integer number (3983995).

Almost surely, 2^7967989 is an apocalyptic number.

It is an amenable number.

7967989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7967989 is an equidigital number, since it uses as much as digits as its factorization.

7967989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 7967989 is about 2822.7626538553. The cubic root of 7967989 is about 199.7328850736.

The spelling of 7967989 in words is "seven million, nine hundred sixty-seven thousand, nine hundred eighty-nine".