253616569 has 2 divisors, whose sum is σ = 253616570. Its totient is φ = 253616568.

The previous prime is 253616563. The next prime is 253616593. The reversal of 253616569 is 965616352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166100544 + 87516025 = 12888^2 + 9355^2 .

It is a cyclic number.

It is not a de Polignac number, because 253616569 - 2¹⁷ = 253485497 is a prime.

It is a super-4 number, since 4×253616569⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is equal to p_13866289 and since 253616569 and 13866289 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (253616563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126808284 + 126808285.

It is an arithmetic number, because the mean of its divisors is an integer number (126808285).

Almost surely, 2^253616569 is an apocalyptic number.

It is an amenable number.

253616569 is a deficient number, since it is larger than the sum of its proper divisors (1).

253616569 is an equidigital number, since it uses as much as digits as its factorization.

253616569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The square root of 253616569 is about 15925.3436069681. The cubic root of 253616569 is about 632.9837209546.

The spelling of 253616569 in words is "two hundred fifty-three million, six hundred sixteen thousand, five hundred sixty-nine".