557420777 has 2 divisors, whose sum is σ = 557420778. Its totient is φ = 557420776.

The previous prime is 557420741. The next prime is 557420797. The reversal of 557420777 is 777024755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384787456 + 172633321 = 19616^2 + 13139^2 .

It is a cyclic number.

It is not a de Polignac number, because 557420777 - 2¹² = 557416681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (557420737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278710388 + 278710389.

It is an arithmetic number, because the mean of its divisors is an integer number (278710389).

Almost surely, 2^557420777 is an apocalyptic number.

It is an amenable number.

557420777 is a deficient number, since it is larger than the sum of its proper divisors (1).

557420777 is an equidigital number, since it uses as much as digits as its factorization.

557420777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480200, while the sum is 44.

The square root of 557420777 is about 23609.7602063215. The cubic root of 557420777 is about 822.9896700798.

The spelling of 557420777 in words is "five hundred fifty-seven million, four hundred twenty thousand, seven hundred seventy-seven".