253785439 has 2 divisors, whose sum is σ = 253785440. Its totient is φ = 253785438.

The previous prime is 253785421. The next prime is 253785487. The reversal of 253785439 is 934587352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253785439 - 2⁵ = 253785407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253785139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126892719 + 126892720.

It is an arithmetic number, because the mean of its divisors is an integer number (126892720).

Almost surely, 2^253785439 is an apocalyptic number.

253785439 is a deficient number, since it is larger than the sum of its proper divisors (1).

253785439 is an equidigital number, since it uses as much as digits as its factorization.

253785439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 46.

The square root of 253785439 is about 15930.6446511119. The cubic root of 253785439 is about 633.1241800284.

The spelling of 253785439 in words is "two hundred fifty-three million, seven hundred eighty-five thousand, four hundred thirty-nine".