253205387 has 2 divisors, whose sum is σ = 253205388. Its totient is φ = 253205386.

The previous prime is 253205377. The next prime is 253205389. The reversal of 253205387 is 783502352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253205387 - 2⁸ = 253205131 is a prime.

It is a super-2 number, since 2×253205387² = 128225936011639538, which contains 22 as substring.

Together with 253205389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253205389) 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, 126602693 + 126602694.

It is an arithmetic number, because the mean of its divisors is an integer number (126602694).

Almost surely, 2^253205387 is an apocalyptic number.

253205387 is a deficient number, since it is larger than the sum of its proper divisors (1).

253205387 is an equidigital number, since it uses as much as digits as its factorization.

253205387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 253205387 is about 15912.4286958340. The cubic root of 253205387 is about 632.6414558608.

The spelling of 253205387 in words is "two hundred fifty-three million, two hundred five thousand, three hundred eighty-seven".