471643969 has 4 divisors (see below), whose sum is σ = 473043844. Its totient is φ = 470244096.

The previous prime is 471643967. The next prime is 471643987. The reversal of 471643969 is 969346174.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969346174 = 2 ⋅484673087.

It can be written as a sum of positive squares in 2 ways, for example, as 215003569 + 256640400 = 14663^2 + 16020^2 .

It is a cyclic number.

It is not a de Polignac number, because 471643969 - 2¹ = 471643967 is a prime.

It is a super-2 number, since 2×471643969² = 444896066988145922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (471643961) 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, 699432 + ... + 700105.

It is an arithmetic number, because the mean of its divisors is an integer number (118260961).

Almost surely, 2^471643969 is an apocalyptic number.

It is an amenable number.

471643969 is a deficient number, since it is larger than the sum of its proper divisors (1399875).

471643969 is a wasteful number, since it uses less digits than its factorization.

471643969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399874.

The product of its digits is 979776, while the sum is 49.

The square root of 471643969 is about 21717.3656091157. The cubic root of 471643969 is about 778.4034673487.

The spelling of 471643969 in words is "four hundred seventy-one million, six hundred forty-three thousand, nine hundred sixty-nine".