25393 has 4 divisors (see below), whose sum is σ = 25840. Its totient is φ = 24948.

The previous prime is 25391. The next prime is 25409. The reversal of 25393 is 39352.

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 25393 - 2¹ = 25391 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (25391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123 + ... + 256.

It is an arithmetic number, because the mean of its divisors is an integer number (6460).

2²⁵³⁹³ is an apocalyptic number.

It is an amenable number.

25393 is a deficient number, since it is larger than the sum of its proper divisors (447).

25393 is an equidigital number, since it uses as much as digits as its factorization.

25393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its digits is 810, while the sum is 22.

The square root of 25393 is about 159.3518120386. The cubic root of 25393 is about 29.3925999856.

The spelling of 25393 in words is "twenty-five thousand, three hundred ninety-three".