471894981 has 4 divisors (see below), whose sum is σ = 629193312. Its totient is φ = 314596652.

The previous prime is 471894977. The next prime is 471894991. The reversal of 471894981 is 189498174.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 471894981 - 2² = 471894977 is a prime.

It is a super-2 number, since 2×471894981² = 445369746185980722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (471894901) 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, 78649161 + ... + 78649166.

It is an arithmetic number, because the mean of its divisors is an integer number (157298328).

Almost surely, 2^471894981 is an apocalyptic number.

It is an amenable number.

471894981 is a deficient number, since it is larger than the sum of its proper divisors (157298331).

471894981 is a wasteful number, since it uses less digits than its factorization.

471894981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157298330.

The product of its digits is 580608, while the sum is 51.

The square root of 471894981 is about 21723.1439022992. The cubic root of 471894981 is about 778.5415333277.

It can be divided in two parts, 4718 and 94981, that added together give a palindrome (99699).

The spelling of 471894981 in words is "four hundred seventy-one million, eight hundred ninety-four thousand, nine hundred eighty-one".