25786949 has 4 divisors (see below), whose sum is σ = 26076780. Its totient is φ = 25497120.

The previous prime is 25786927. The next prime is 25786951. The reversal of 25786949 is 94968752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1600225 + 24186724 = 1265^2 + 4918^2 .

It is a cyclic number.

It is not a de Polignac number, because 25786949 - 2⁸ = 25786693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25786897 and 25786906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25786349) 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, 144782 + ... + 144959.

It is an arithmetic number, because the mean of its divisors is an integer number (6519195).

Almost surely, 2^25786949 is an apocalyptic number.

It is an amenable number.

25786949 is a deficient number, since it is larger than the sum of its proper divisors (289831).

25786949 is an equidigital number, since it uses as much as digits as its factorization.

25786949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289830.

The product of its digits is 1088640, while the sum is 50.

The square root of 25786949 is about 5078.0851706130. The cubic root of 25786949 is about 295.4382034899.

The spelling of 25786949 in words is "twenty-five million, seven hundred eighty-six thousand, nine hundred forty-nine".