253205389 has 2 divisors, whose sum is σ = 253205390. Its totient is φ = 253205388.

The previous prime is 253205387. The next prime is 253205417. The reversal of 253205389 is 983502352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251476164 + 1729225 = 15858^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 253205389 - 2¹ = 253205387 is a prime.

It is a super-2 number, since 2×253205389² = 128225938037282642, which contains 22 as substring.

Together with 253205387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253205387) 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, 126602694 + 126602695.

It is an arithmetic number, because the mean of its divisors is an integer number (126602695).

Almost surely, 2^253205389 is an apocalyptic number.

It is an amenable number.

253205389 is a deficient number, since it is larger than the sum of its proper divisors (1).

253205389 is an equidigital number, since it uses as much as digits as its factorization.

253205389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 253205389 is about 15912.4287586779. The cubic root of 253205389 is about 632.6414575265.

The spelling of 253205389 in words is "two hundred fifty-three million, two hundred five thousand, three hundred eighty-nine".