485387989 has 2 divisors, whose sum is σ = 485387990. Its totient is φ = 485387988.

The previous prime is 485387957. The next prime is 485388011. The reversal of 485387989 is 989783584.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377019889 + 108368100 = 19417^2 + 10410^2 .

It is a cyclic number.

It is not a de Polignac number, because 485387989 - 2⁵ = 485387957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (485387489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242693994 + 242693995.

It is an arithmetic number, because the mean of its divisors is an integer number (242693995).

Almost surely, 2^485387989 is an apocalyptic number.

It is an amenable number.

485387989 is a deficient number, since it is larger than the sum of its proper divisors (1).

485387989 is an equidigital number, since it uses as much as digits as its factorization.

485387989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 61.

The square root of 485387989 is about 22031.5226210083. The cubic root of 485387989 is about 785.8922544157.

The spelling of 485387989 in words is "four hundred eighty-five million, three hundred eighty-seven thousand, nine hundred eighty-nine".