253905389 has 2 divisors, whose sum is σ = 253905390. Its totient is φ = 253905388.

The previous prime is 253905361. The next prime is 253905391. The reversal of 253905389 is 983509352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154803364 + 99102025 = 12442^2 + 9955^2 .

It is a cyclic number.

It is not a de Polignac number, because 253905389 - 2⁸ = 253905133 is a prime.

Together with 253905391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253925389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126952694 + 126952695.

It is an arithmetic number, because the mean of its divisors is an integer number (126952695).

Almost surely, 2^253905389 is an apocalyptic number.

It is an amenable number.

253905389 is a deficient number, since it is larger than the sum of its proper divisors (1).

253905389 is an equidigital number, since it uses as much as digits as its factorization.

253905389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 253905389 is about 15934.4089629958. The cubic root of 253905389 is about 633.2239116287.

The spelling of 253905389 in words is "two hundred fifty-three million, nine hundred five thousand, three hundred eighty-nine".