253457823 has 4 divisors (see below), whose sum is σ = 337943768. Its totient is φ = 168971880.

The previous prime is 253457821. The next prime is 253457863. The reversal of 253457823 is 328754352.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 253457823 - 2¹ = 253457821 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 (253457821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42242968 + ... + 42242973.

It is an arithmetic number, because the mean of its divisors is an integer number (84485942).

Almost surely, 2^253457823 is an apocalyptic number.

253457823 is a deficient number, since it is larger than the sum of its proper divisors (84485945).

253457823 is an equidigital number, since it uses as much as digits as its factorization.

253457823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84485944.

The product of its digits is 201600, while the sum is 39.

The square root of 253457823 is about 15920.3587585205. The cubic root of 253457823 is about 632.8516257388.

The spelling of 253457823 in words is "two hundred fifty-three million, four hundred fifty-seven thousand, eight hundred twenty-three".