447686989 has 2 divisors, whose sum is σ = 447686990. Its totient is φ = 447686988.

The previous prime is 447686971. The next prime is 447687011. The reversal of 447686989 is 989686744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287031364 + 160655625 = 16942^2 + 12675^2 .

It is a cyclic number.

It is not a de Polignac number, because 447686989 - 2⁵ = 447686957 is a prime.

It is a super-2 number, since 2×447686989² = 400847280239772242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447686969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223843494 + 223843495.

It is an arithmetic number, because the mean of its divisors is an integer number (223843495).

Almost surely, 2^447686989 is an apocalyptic number.

It is an amenable number.

447686989 is a deficient number, since it is larger than the sum of its proper divisors (1).

447686989 is an equidigital number, since it uses as much as digits as its factorization.

447686989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 61.

The square root of 447686989 is about 21158.6150066586. The cubic root of 447686989 is about 764.9942266783.

The spelling of 447686989 in words is "four hundred forty-seven million, six hundred eighty-six thousand, nine hundred eighty-nine".