571469947 has 2 divisors, whose sum is σ = 571469948. Its totient is φ = 571469946.

The previous prime is 571469923. The next prime is 571469953. The reversal of 571469947 is 749964175.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-571469947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 571469894 and 571469903.

It is not a weakly prime, because it can be changed into another prime (571469147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285734973 + 285734974.

It is an arithmetic number, because the mean of its divisors is an integer number (285734974).

Almost surely, 2^571469947 is an apocalyptic number.

571469947 is a deficient number, since it is larger than the sum of its proper divisors (1).

571469947 is an equidigital number, since it uses as much as digits as its factorization.

571469947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 571469947 is about 23905.4376031898. The cubic root of 571469947 is about 829.8465613686.

The spelling of 571469947 in words is "five hundred seventy-one million, four hundred sixty-nine thousand, nine hundred forty-seven".