25306393 has 6 divisors (see below), whose sum is σ = 29438106. Its totient is φ = 21691152.

The previous prime is 25306373. The next prime is 25306429. The reversal of 25306393 is 39360352.

It can be written as a sum of positive squares in only one way, i.e., 23736384 + 1570009 = 4872^2 + 1253^2 .

It is not a de Polignac number, because 25306393 - 2⁵ = 25306361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25306373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258180 + ... + 258277.

It is an arithmetic number, because the mean of its divisors is an integer number (4906351).

Almost surely, 2^25306393 is an apocalyptic number.

It is an amenable number.

25306393 is a deficient number, since it is larger than the sum of its proper divisors (4131713).

25306393 is an equidigital number, since it uses as much as digits as its factorization.

25306393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516471 (or 516464 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 31.

The square root of 25306393 is about 5030.5459942237. The cubic root of 25306393 is about 293.5914582534.

The spelling of 25306393 in words is "twenty-five million, three hundred six thousand, three hundred ninety-three".