471448981 has 4 divisors (see below), whose sum is σ = 499181292. Its totient is φ = 443716672.

The previous prime is 471448979. The next prime is 471448987. The reversal of 471448981 is 189844174.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 435556900 + 35892081 = 20870^2 + 5991^2 .

It is a cyclic number.

It is not a de Polignac number, because 471448981 - 2¹ = 471448979 is a prime.

It is a super-2 number, since 2×471448981² = 444528283371876722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (471448987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13866130 + ... + 13866163.

It is an arithmetic number, because the mean of its divisors is an integer number (124795323).

Almost surely, 2^471448981 is an apocalyptic number.

It is an amenable number.

471448981 is a deficient number, since it is larger than the sum of its proper divisors (27732311).

471448981 is a wasteful number, since it uses less digits than its factorization.

471448981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27732310.

The product of its digits is 258048, while the sum is 46.

The square root of 471448981 is about 21712.8759265096. The cubic root of 471448981 is about 778.2961828528.

The spelling of 471448981 in words is "four hundred seventy-one million, four hundred forty-eight thousand, nine hundred eighty-one".