557916901 has 2 divisors, whose sum is σ = 557916902. Its totient is φ = 557916900.

The previous prime is 557916899. The next prime is 557916913. The reversal of 557916901 is 109619755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 530196676 + 27720225 = 23026^2 + 5265^2 .

It is a cyclic number.

It is not a de Polignac number, because 557916901 - 2¹ = 557916899 is a prime.

It is a super-2 number, since 2×557916901² = 622542536842887602, which contains 22 as substring.

Together with 557916899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557916301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278958450 + 278958451.

It is an arithmetic number, because the mean of its divisors is an integer number (278958451).

Almost surely, 2^557916901 is an apocalyptic number.

It is an amenable number.

557916901 is a deficient number, since it is larger than the sum of its proper divisors (1).

557916901 is an equidigital number, since it uses as much as digits as its factorization.

557916901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85050, while the sum is 43.

The square root of 557916901 is about 23620.2646259520. The cubic root of 557916901 is about 823.2337608808.

The spelling of 557916901 in words is "five hundred fifty-seven million, nine hundred sixteen thousand, nine hundred one".