25578479 has 2 divisors, whose sum is σ = 25578480. Its totient is φ = 25578478.

The previous prime is 25578473. The next prime is 25578517. The reversal of 25578479 is 97487552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25578479 - 2⁴ = 25578463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25578473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12789239 + 12789240.

It is an arithmetic number, because the mean of its divisors is an integer number (12789240).

Almost surely, 2^25578479 is an apocalyptic number.

25578479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25578479 is an equidigital number, since it uses as much as digits as its factorization.

25578479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 47.

The square root of 25578479 is about 5057.5170785673. The cubic root of 25578479 is about 294.6399091940.

The spelling of 25578479 in words is "twenty-five million, five hundred seventy-eight thousand, four hundred seventy-nine".