253905709 has 2 divisors, whose sum is σ = 253905710. Its totient is φ = 253905708.

The previous prime is 253905677. The next prime is 253905737. The reversal of 253905709 is 907509352.

253905709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174160809 + 79744900 = 13197^2 + 8930^2 .

It is a cyclic number.

It is not a de Polignac number, because 253905709 - 2⁵ = 253905677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253905749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126952854 + 126952855.

It is an arithmetic number, because the mean of its divisors is an integer number (126952855).

Almost surely, 2^253905709 is an apocalyptic number.

It is an amenable number.

253905709 is a deficient number, since it is larger than the sum of its proper divisors (1).

253905709 is an equidigital number, since it uses as much as digits as its factorization.

253905709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 253905709 is about 15934.4190041558. The cubic root of 253905709 is about 633.2241776484.

The spelling of 253905709 in words is "two hundred fifty-three million, nine hundred five thousand, seven hundred nine".