575507921 has 2 divisors, whose sum is σ = 575507922. Its totient is φ = 575507920.

The previous prime is 575507873. The next prime is 575507927. The reversal of 575507921 is 129705575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422713600 + 152794321 = 20560^2 + 12361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-575507921 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (575507927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287753960 + 287753961.

It is an arithmetic number, because the mean of its divisors is an integer number (287753961).

Almost surely, 2^575507921 is an apocalyptic number.

It is an amenable number.

575507921 is a deficient number, since it is larger than the sum of its proper divisors (1).

575507921 is an equidigital number, since it uses as much as digits as its factorization.

575507921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110250, while the sum is 41.

The square root of 575507921 is about 23989.7461637259. The cubic root of 575507921 is about 831.7965252428.

The spelling of 575507921 in words is "five hundred seventy-five million, five hundred seven thousand, nine hundred twenty-one".