253409893 has 4 divisors (see below), whose sum is σ = 276447168. Its totient is φ = 230372620.

The previous prime is 253409839. The next prime is 253409899. The reversal of 253409893 is 398904352.

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 253409893 - 2⁹ = 253409381 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 (253409899) 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, 11518621 + ... + 11518642.

It is an arithmetic number, because the mean of its divisors is an integer number (69111792).

Almost surely, 2^253409893 is an apocalyptic number.

It is an amenable number.

253409893 is a deficient number, since it is larger than the sum of its proper divisors (23037275).

253409893 is a wasteful number, since it uses less digits than its factorization.

253409893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23037274.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 253409893 is about 15918.8533820750. The cubic root of 253409893 is about 632.8117315396.

The spelling of 253409893 in words is "two hundred fifty-three million, four hundred nine thousand, eight hundred ninety-three".