253968289 has 2 divisors, whose sum is σ = 253968290. Its totient is φ = 253968288.

The previous prime is 253968203. The next prime is 253968293. The reversal of 253968289 is 982869352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174900625 + 79067664 = 13225^2 + 8892^2 .

It is a cyclic number.

It is not a de Polignac number, because 253968289 - 2¹³ = 253960097 is a prime.

It is not a weakly prime, because it can be changed into another prime (253965289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126984144 + 126984145.

It is an arithmetic number, because the mean of its divisors is an integer number (126984145).

Almost surely, 2^253968289 is an apocalyptic number.

It is an amenable number.

253968289 is a deficient number, since it is larger than the sum of its proper divisors (1).

253968289 is an equidigital number, since it uses as much as digits as its factorization.

253968289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The square root of 253968289 is about 15936.3825569042. The cubic root of 253968289 is about 633.2761968462.

The spelling of 253968289 in words is "two hundred fifty-three million, nine hundred sixty-eight thousand, two hundred eighty-nine".