473523821 has 2 divisors, whose sum is σ = 473523822. Its totient is φ = 473523820.

The previous prime is 473523767. The next prime is 473523823. The reversal of 473523821 is 128325374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461175625 + 12348196 = 21475^2 + 3514^2 .

It is a cyclic number.

It is not a de Polignac number, because 473523821 - 2²² = 469329517 is a prime.

Together with 473523823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (473523823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236761910 + 236761911.

It is an arithmetic number, because the mean of its divisors is an integer number (236761911).

Almost surely, 2^473523821 is an apocalyptic number.

It is an amenable number.

473523821 is a deficient number, since it is larger than the sum of its proper divisors (1).

473523821 is an equidigital number, since it uses as much as digits as its factorization.

473523821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 473523821 is about 21760.6024962546. The cubic root of 473523821 is about 779.4362686519.

The spelling of 473523821 in words is "four hundred seventy-three million, five hundred twenty-three thousand, eight hundred twenty-one".