253955509 has 4 divisors (see below), whose sum is σ = 254529216. Its totient is φ = 253381804.

The previous prime is 253955491. The next prime is 253955519. The reversal of 253955509 is 905559352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253955509 - 2⁵ = 253955477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253955519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286189 + ... + 287074.

It is an arithmetic number, because the mean of its divisors is an integer number (63632304).

Almost surely, 2^253955509 is an apocalyptic number.

It is an amenable number.

253955509 is a deficient number, since it is larger than the sum of its proper divisors (573707).

253955509 is an equidigital number, since it uses as much as digits as its factorization.

253955509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573706.

The product of its (nonzero) digits is 303750, while the sum is 43.

The square root of 253955509 is about 15935.9815825697. The cubic root of 253955509 is about 633.2655742528.

The spelling of 253955509 in words is "two hundred fifty-three million, nine hundred fifty-five thousand, five hundred nine".