8018557 has 2 divisors, whose sum is σ = 8018558. Its totient is φ = 8018556.

The previous prime is 8018519. The next prime is 8018561. The reversal of 8018557 is 7558108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7958041 + 60516 = 2821^2 + 246^2 .

It is a cyclic number.

It is not a de Polignac number, because 8018557 - 2¹⁹ = 7494269 is a prime.

8018557 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8018567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4009278 + 4009279.

It is an arithmetic number, because the mean of its divisors is an integer number (4009279).

Almost surely, 2^8018557 is an apocalyptic number.

It is an amenable number.

8018557 is a deficient number, since it is larger than the sum of its proper divisors (1).

8018557 is an equidigital number, since it uses as much as digits as its factorization.

8018557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 8018557 is about 2831.7056697333. The cubic root of 8018557 is about 200.1545222503.

The spelling of 8018557 in words is "eight million, eighteen thousand, five hundred fifty-seven".