471656989 has 8 divisors (see below), whose sum is σ = 484255800. Its totient is φ = 459110400.

The previous prime is 471656923. The next prime is 471657029. The reversal of 471656989 is 989656174.

It can be written as a sum of positive squares in 4 ways, for example, as 28900 + 471628089 = 170^2 + 21717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 471656989 - 2¹¹ = 471654941 is a prime.

It is a super-2 number, since 2×471656989² = 444920630545092242, 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 (471653989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5599 + ... + 31219.

It is an arithmetic number, because the mean of its divisors is an integer number (60531975).

Almost surely, 2^471656989 is an apocalyptic number.

It is an amenable number.

471656989 is a deficient number, since it is larger than the sum of its proper divisors (12598811).

471656989 is a wasteful number, since it uses less digits than its factorization.

471656989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26111.

The product of its digits is 3265920, while the sum is 55.

The square root of 471656989 is about 21717.6653671614. The cubic root of 471656989 is about 778.4106300396.

The spelling of 471656989 in words is "four hundred seventy-one million, six hundred fifty-six thousand, nine hundred eighty-nine".