573243991 has 2 divisors, whose sum is σ = 573243992. Its totient is φ = 573243990.

The previous prime is 573243959. The next prime is 573244013. The reversal of 573243991 is 199342375.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 573243991 - 2⁵ = 573243959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (573246991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286621995 + 286621996.

It is an arithmetic number, because the mean of its divisors is an integer number (286621996).

Almost surely, 2^573243991 is an apocalyptic number.

573243991 is a deficient number, since it is larger than the sum of its proper divisors (1).

573243991 is an equidigital number, since it uses as much as digits as its factorization.

573243991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 573243991 is about 23942.5142998809. The cubic root of 573243991 is about 830.7043863221.

The spelling of 573243991 in words is "five hundred seventy-three million, two hundred forty-three thousand, nine hundred ninety-one".