479971839989 has 2 divisors, whose sum is σ = 479971839990. Its totient is φ = 479971839988.

The previous prime is 479971839961. The next prime is 479971840021. The reversal of 479971839989 is 989938179974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 472058314225 + 7913525764 = 687065^2 + 88958^2 .

It is a cyclic number.

It is not a de Polignac number, because 479971839989 - 2¹⁶ = 479971774453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479971899989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239985919994 + 239985919995.

It is an arithmetic number, because the mean of its divisors is an integer number (239985919995).

Almost surely, 2^479971839989 is an apocalyptic number.

It is an amenable number.

479971839989 is a deficient number, since it is larger than the sum of its proper divisors (1).

479971839989 is an equidigital number, since it uses as much as digits as its factorization.

479971839989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222131968, while the sum is 83.

The spelling of 479971839989 in words is "four hundred seventy-nine billion, nine hundred seventy-one million, eight hundred thirty-nine thousand, nine hundred eighty-nine".