25803993 has 4 divisors (see below), whose sum is σ = 34405328. Its totient is φ = 17202660.

The previous prime is 25803991. The next prime is 25804001. The reversal of 25803993 is 39930852.

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 not a de Polignac number, because 25803993 - 2¹ = 25803991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25803991) 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, 4300663 + ... + 4300668.

It is an arithmetic number, because the mean of its divisors is an integer number (8601332).

Almost surely, 2^25803993 is an apocalyptic number.

It is an amenable number.

25803993 is a deficient number, since it is larger than the sum of its proper divisors (8601335).

25803993 is an equidigital number, since it uses as much as digits as its factorization.

25803993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8601334.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 25803993 is about 5079.7630850267. The cubic root of 25803993 is about 295.5032795580.

It can be divided in two parts, 25803 and 993, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 25803993 in words is "twenty-five million, eight hundred three thousand, nine hundred ninety-three".