253905473 has 2 divisors, whose sum is σ = 253905474. Its totient is φ = 253905472.

The previous prime is 253905427. The next prime is 253905479. The reversal of 253905473 is 374509352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242829889 + 11075584 = 15583^2 + 3328^2 .

It is a cyclic number.

It is not a de Polignac number, because 253905473 - 2⁶ = 253905409 is a prime.

It is not a weakly prime, because it can be changed into another prime (253905479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126952736 + 126952737.

It is an arithmetic number, because the mean of its divisors is an integer number (126952737).

Almost surely, 2^253905473 is an apocalyptic number.

It is an amenable number.

253905473 is a deficient number, since it is larger than the sum of its proper divisors (1).

253905473 is an equidigital number, since it uses as much as digits as its factorization.

253905473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 38.

The square root of 253905473 is about 15934.4115988009. The cubic root of 253905473 is about 633.2239814589.

The spelling of 253905473 in words is "two hundred fifty-three million, nine hundred five thousand, four hundred seventy-three".