248729989 has 2 divisors, whose sum is σ = 248729990. Its totient is φ = 248729988.

The previous prime is 248729959. The next prime is 248729993. The reversal of 248729989 is 989927842.

248729989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248062500 + 667489 = 15750^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 248729989 - 2¹³ = 248721797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248729959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124364994 + 124364995.

It is an arithmetic number, because the mean of its divisors is an integer number (124364995).

Almost surely, 2^248729989 is an apocalyptic number.

It is an amenable number.

248729989 is a deficient number, since it is larger than the sum of its proper divisors (1).

248729989 is an equidigital number, since it uses as much as digits as its factorization.

248729989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 58.

The square root of 248729989 is about 15771.1758914800. The cubic root of 248729989 is about 628.8919710710.

The spelling of 248729989 in words is "two hundred forty-eight million, seven hundred twenty-nine thousand, nine hundred eighty-nine".