25779983 has 4 divisors (see below), whose sum is σ = 25790400. Its totient is φ = 25769568.

The previous prime is 25779977. The next prime is 25779997. The reversal of 25779983 is 38997752.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25779983 - 2¹⁰ = 25778959 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 (25719983) 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, 866 + ... + 7232.

It is an arithmetic number, because the mean of its divisors is an integer number (6447600).

Almost surely, 2^25779983 is an apocalyptic number.

25779983 is a deficient number, since it is larger than the sum of its proper divisors (10417).

25779983 is an equidigital number, since it uses as much as digits as its factorization.

25779983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10416.

The product of its digits is 952560, while the sum is 50.

The square root of 25779983 is about 5077.3992358293. The cubic root of 25779983 is about 295.4115981986.

It can be divided in two parts, 25779 and 983, that added together give a palindrome (26762).

The spelling of 25779983 in words is "twenty-five million, seven hundred seventy-nine thousand, nine hundred eighty-three".