25898647 has 4 divisors (see below), whose sum is σ = 25955776. Its totient is φ = 25841520.

The previous prime is 25898627. The next prime is 25898659. The reversal of 25898647 is 74689852.

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 25898647 - 2¹¹ = 25896599 is a prime.

It is a super-3 number, since 3×25898647³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25898647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25898627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27879 + ... + 28792.

It is an arithmetic number, because the mean of its divisors is an integer number (6488944).

Almost surely, 2^25898647 is an apocalyptic number.

25898647 is a deficient number, since it is larger than the sum of its proper divisors (57129).

25898647 is an equidigital number, since it uses as much as digits as its factorization.

25898647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57128.

The product of its digits is 967680, while the sum is 49.

The square root of 25898647 is about 5089.0713298204. The cubic root of 25898647 is about 295.8641595773.

It can be divided in two parts, 2589 and 8647, that added together give a square (11236 = 106²).

The spelling of 25898647 in words is "twenty-five million, eight hundred ninety-eight thousand, six hundred forty-seven".