479845981 has 2 divisors, whose sum is σ = 479845982. Its totient is φ = 479845980.

The previous prime is 479845973. The next prime is 479845999. The reversal of 479845981 is 189548974.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301196025 + 178649956 = 17355^2 + 13366^2 .

It is a cyclic number.

It is not a de Polignac number, because 479845981 - 2³ = 479845973 is a prime.

It is a super-2 number, since 2×479845981² = 460504330963704722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479845381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239922990 + 239922991.

It is an arithmetic number, because the mean of its divisors is an integer number (239922991).

Almost surely, 2^479845981 is an apocalyptic number.

It is an amenable number.

479845981 is a deficient number, since it is larger than the sum of its proper divisors (1).

479845981 is an equidigital number, since it uses as much as digits as its factorization.

479845981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 55.

The square root of 479845981 is about 21905.3870315044. The cubic root of 479845981 is about 782.8897742751.

The spelling of 479845981 in words is "four hundred seventy-nine million, eight hundred forty-five thousand, nine hundred eighty-one".