471447421 has 2 divisors, whose sum is σ = 471447422. Its totient is φ = 471447420.

The previous prime is 471447391. The next prime is 471447433. The reversal of 471447421 is 124744174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420824196 + 50623225 = 20514^2 + 7115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-471447421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (471447481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235723710 + 235723711.

It is an arithmetic number, because the mean of its divisors is an integer number (235723711).

Almost surely, 2^471447421 is an apocalyptic number.

It is an amenable number.

471447421 is a deficient number, since it is larger than the sum of its proper divisors (1).

471447421 is an equidigital number, since it uses as much as digits as its factorization.

471447421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 34.

The square root of 471447421 is about 21712.8400030949. The cubic root of 471447421 is about 778.2953244047.

The spelling of 471447421 in words is "four hundred seventy-one million, four hundred forty-seven thousand, four hundred twenty-one".