557621749 has 2 divisors, whose sum is σ = 557621750. Its totient is φ = 557621748.

The previous prime is 557621741. The next prime is 557621761. The reversal of 557621749 is 947126755.

557621749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 554272849 + 3348900 = 23543^2 + 1830^2 .

It is a cyclic number.

It is not a de Polignac number, because 557621749 - 2³ = 557621741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 557621699 and 557621708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557621741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278810874 + 278810875.

It is an arithmetic number, because the mean of its divisors is an integer number (278810875).

Almost surely, 2^557621749 is an apocalyptic number.

It is an amenable number.

557621749 is a deficient number, since it is larger than the sum of its proper divisors (1).

557621749 is an equidigital number, since it uses as much as digits as its factorization.

557621749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 557621749 is about 23614.0159439262. The cubic root of 557621749 is about 823.0885648546.

The spelling of 557621749 in words is "five hundred fifty-seven million, six hundred twenty-one thousand, seven hundred forty-nine".