25073209 has 16 divisors (see below), whose sum is σ = 29339008. Its totient is φ = 20984832.

The previous prime is 25073189. The next prime is 25073219. The reversal of 25073209 is 90237052.

25073209 is nontrivially palindromic in base 13.

It is a cyclic number.

It is not a de Polignac number, because 25073209 - 2¹¹ = 25071161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25073219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90379 + ... + 90655.

It is an arithmetic number, because the mean of its divisors is an integer number (1833688).

Almost surely, 2^25073209 is an apocalyptic number.

It is an amenable number.

25073209 is a deficient number, since it is larger than the sum of its proper divisors (4265799).

25073209 is a wasteful number, since it uses less digits than its factorization.

25073209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 25073209 is about 5007.3155482753. The cubic root of 25073209 is about 292.6869148897.

The spelling of 25073209 in words is "twenty-five million, seventy-three thousand, two hundred nine".