557643287 has 2 divisors, whose sum is σ = 557643288. Its totient is φ = 557643286.

The previous prime is 557643269. The next prime is 557643319. The reversal of 557643287 is 782346755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557643287 - 2⁶ = 557643223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557640287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278821643 + 278821644.

It is an arithmetic number, because the mean of its divisors is an integer number (278821644).

Almost surely, 2^557643287 is an apocalyptic number.

557643287 is a deficient number, since it is larger than the sum of its proper divisors (1).

557643287 is an equidigital number, since it uses as much as digits as its factorization.

557643287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 47.

The square root of 557643287 is about 23614.4719822400. The cubic root of 557643287 is about 823.0991619145.

The spelling of 557643287 in words is "five hundred fifty-seven million, six hundred forty-three thousand, two hundred eighty-seven".