557257007 has 2 divisors, whose sum is σ = 557257008. Its totient is φ = 557257006.

The previous prime is 557257003. The next prime is 557257009. The reversal of 557257007 is 700752755.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557257007 - 2² = 557257003 is a prime.

Together with 557257009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557257003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278628503 + 278628504.

It is an arithmetic number, because the mean of its divisors is an integer number (278628504).

Almost surely, 2^557257007 is an apocalyptic number.

557257007 is a deficient number, since it is larger than the sum of its proper divisors (1).

557257007 is an equidigital number, since it uses as much as digits as its factorization.

557257007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85750, while the sum is 38.

The square root of 557257007 is about 23606.2916825155. The cubic root of 557257007 is about 822.9090641740.

The spelling of 557257007 in words is "five hundred fifty-seven million, two hundred fifty-seven thousand, seven".