25909013 has 8 divisors (see below), whose sum is σ = 28075488. Its totient is φ = 23767344.

The previous prime is 25909001. The next prime is 25909061. The reversal of 25909013 is 31090952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25909013 - 2¹⁸ = 25646869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25909073) 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 7 ways as a sum of consecutive naturals, for example, 3995 + ... + 8232.

It is an arithmetic number, because the mean of its divisors is an integer number (3509436).

Almost surely, 2^25909013 is an apocalyptic number.

It is an amenable number.

25909013 is a deficient number, since it is larger than the sum of its proper divisors (2166475).

25909013 is a wasteful number, since it uses less digits than its factorization.

25909013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12403.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 25909013 is about 5090.0896848680. The cubic root of 25909013 is about 295.9036277754.

Adding to 25909013 its reverse (31090952), we get a palindrome (56999965).

The spelling of 25909013 in words is "twenty-five million, nine hundred nine thousand, thirteen".