7423487989 has 2 divisors, whose sum is σ = 7423487990. Its totient is φ = 7423487988.

The previous prime is 7423487987. The next prime is 7423488001. The reversal of 7423487989 is 9897843247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7063057764 + 360430225 = 84042^2 + 18985^2 .

It is a cyclic number.

It is not a de Polignac number, because 7423487989 - 2¹ = 7423487987 is a prime.

Together with 7423487987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7423487987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3711743994 + 3711743995.

It is an arithmetic number, because the mean of its divisors is an integer number (3711743995).

Almost surely, 2^7423487989 is an apocalyptic number.

It is an amenable number.

7423487989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7423487989 is an equidigital number, since it uses as much as digits as its factorization.

7423487989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The square root of 7423487989 is about 86159.6656736782. The cubic root of 7423487989 is about 1950.7547364674.

The spelling of 7423487989 in words is "seven billion, four hundred twenty-three million, four hundred eighty-seven thousand, nine hundred eighty-nine".