25927949 has 4 divisors (see below), whose sum is σ = 26560380. Its totient is φ = 25295520.

The previous prime is 25927933. The next prime is 25927961. The reversal of 25927949 is 94972952.

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 8970025 + 16957924 = 2995^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 25927949 - 2⁴ = 25927933 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 (25927549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316154 + ... + 316235.

It is an arithmetic number, because the mean of its divisors is an integer number (6640095).

Almost surely, 2^25927949 is an apocalyptic number.

It is an amenable number.

25927949 is a deficient number, since it is larger than the sum of its proper divisors (632431).

25927949 is an equidigital number, since it uses as much as digits as its factorization.

25927949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632430.

The product of its digits is 408240, while the sum is 47.

The square root of 25927949 is about 5091.9494302281. The cubic root of 25927949 is about 295.9756987902.

The spelling of 25927949 in words is "twenty-five million, nine hundred twenty-seven thousand, nine hundred forty-nine".