557323709 has 2 divisors, whose sum is σ = 557323710. Its totient is φ = 557323708.

The previous prime is 557323693. The next prime is 557323729. The reversal of 557323709 is 907323755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366607609 + 190716100 = 19147^2 + 13810^2 .

It is a cyclic number.

It is not a de Polignac number, because 557323709 - 2⁴ = 557323693 is a prime.

It is a super-2 number, since 2×557323709² = 621219433227033362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557323729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278661854 + 278661855.

It is an arithmetic number, because the mean of its divisors is an integer number (278661855).

Almost surely, 2^557323709 is an apocalyptic number.

It is an amenable number.

557323709 is a deficient number, since it is larger than the sum of its proper divisors (1).

557323709 is an equidigital number, since it uses as much as digits as its factorization.

557323709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 198450, while the sum is 41.

The square root of 557323709 is about 23607.7044415589. The cubic root of 557323709 is about 822.9418961168.

The spelling of 557323709 in words is "five hundred fifty-seven million, three hundred twenty-three thousand, seven hundred nine".