7893989 has 2 divisors, whose sum is σ = 7893990. Its totient is φ = 7893988.

The previous prime is 7893943. The next prime is 7893997. The reversal of 7893989 is 9893987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4060225 + 3833764 = 2015^2 + 1958^2 .

It is a cyclic number.

It is not a de Polignac number, because 7893989 - 2¹⁶ = 7828453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7893989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7893089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3946994 + 3946995.

It is an arithmetic number, because the mean of its divisors is an integer number (3946995).

Almost surely, 2^7893989 is an apocalyptic number.

It is an amenable number.

7893989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7893989 is an equidigital number, since it uses as much as digits as its factorization.

7893989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 7893989 is about 2809.6243521154. The cubic root of 7893989 is about 199.1126438176.

The spelling of 7893989 in words is "seven million, eight hundred ninety-three thousand, nine hundred eighty-nine".