471743981 has 2 divisors, whose sum is σ = 471743982. Its totient is φ = 471743980.

The previous prime is 471743963. The next prime is 471744037. The reversal of 471743981 is 189347174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314743081 + 157000900 = 17741^2 + 12530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-471743981 is a prime.

It is a super-2 number, since 2×471743981² = 445084767219456722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (471743941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235871990 + 235871991.

It is an arithmetic number, because the mean of its divisors is an integer number (235871991).

Almost surely, 2^471743981 is an apocalyptic number.

It is an amenable number.

471743981 is a deficient number, since it is larger than the sum of its proper divisors (1).

471743981 is an equidigital number, since it uses as much as digits as its factorization.

471743981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 471743981 is about 21719.6680683661. The cubic root of 471743981 is about 778.4584835549.

The spelling of 471743981 in words is "four hundred seventy-one million, seven hundred forty-three thousand, nine hundred eighty-one".