7898789 has 2 divisors, whose sum is σ = 7898790. Its totient is φ = 7898788.

The previous prime is 7898767. The next prime is 7898791. The reversal of 7898789 is 9878987.

7898789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5678689 + 2220100 = 2383^2 + 1490^2 .

It is a cyclic number.

It is not a de Polignac number, because 7898789 - 2⁸ = 7898533 is a prime.

Together with 7898791, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7892789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3949394 + 3949395.

It is an arithmetic number, because the mean of its divisors is an integer number (3949395).

Almost surely, 2^7898789 is an apocalyptic number.

It is an amenable number.

7898789 is a deficient number, since it is larger than the sum of its proper divisors (1).

7898789 is an equidigital number, since it uses as much as digits as its factorization.

7898789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 56.

The square root of 7898789 is about 2810.4784290224. The cubic root of 7898789 is about 199.1529929592.

The spelling of 7898789 in words is "seven million, eight hundred ninety-eight thousand, seven hundred eighty-nine".