25577947 has 4 divisors (see below), whose sum is σ = 25831296. Its totient is φ = 25324600.

The previous prime is 25577941. The next prime is 25577957. The reversal of 25577947 is 74977552.

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

It is a cyclic number.

It is not a de Polignac number, because 25577947 - 2¹⁹ = 25053659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25577897 and 25577906.

It is not an unprimeable number, because it can be changed into a prime (25577941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126523 + ... + 126724.

It is an arithmetic number, because the mean of its divisors is an integer number (6457824).

Almost surely, 2^25577947 is an apocalyptic number.

25577947 is a deficient number, since it is larger than the sum of its proper divisors (253349).

25577947 is a wasteful number, since it uses less digits than its factorization.

25577947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253348.

The product of its digits is 617400, while the sum is 46.

The square root of 25577947 is about 5057.4644833157. The cubic root of 25577947 is about 294.6378664674.

The spelling of 25577947 in words is "twenty-five million, five hundred seventy-seven thousand, nine hundred forty-seven".