253666559 has 2 divisors, whose sum is σ = 253666560. Its totient is φ = 253666558.

The previous prime is 253666541. The next prime is 253666573. The reversal of 253666559 is 955666352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253666559 - 2¹² = 253662463 is a prime.

It is equal to p_13868858 and since 253666559 and 13868858 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253666519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126833279 + 126833280.

It is an arithmetic number, because the mean of its divisors is an integer number (126833280).

Almost surely, 2^253666559 is an apocalyptic number.

253666559 is a deficient number, since it is larger than the sum of its proper divisors (1).

253666559 is an equidigital number, since it uses as much as digits as its factorization.

253666559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458000, while the sum is 47.

The square root of 253666559 is about 15926.9130405110. The cubic root of 253666559 is about 633.0253070617.

The spelling of 253666559 in words is "two hundred fifty-three million, six hundred sixty-six thousand, five hundred fifty-nine".