573421906 has 4 divisors (see below), whose sum is σ = 860132862. Its totient is φ = 286710952.

The previous prime is 573421903. The next prime is 573421921. The reversal of 573421906 is 609124375.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 336539025 + 236882881 = 18345^2 + 15391^2 .

It is not an unprimeable number, because it can be changed into a prime (573421903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143355475 + ... + 143355478.

Almost surely, 2^573421906 is an apocalyptic number.

573421906 is a deficient number, since it is larger than the sum of its proper divisors (286710956).

573421906 is a wasteful number, since it uses less digits than its factorization.

573421906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286710955.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 573421906 is about 23946.2294735518. The cubic root of 573421906 is about 830.7903180171.

The spelling of 573421906 in words is "five hundred seventy-three million, four hundred twenty-one thousand, nine hundred six".