25649747 has 2 divisors, whose sum is σ = 25649748. Its totient is φ = 25649746.

The previous prime is 25649731. The next prime is 25649749. The reversal of 25649747 is 74794652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25649747 - 2⁴ = 25649731 is a prime.

Together with 25649749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25649698 and 25649707.

It is not a weakly prime, because it can be changed into another prime (25649749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12824873 + 12824874.

It is an arithmetic number, because the mean of its divisors is an integer number (12824874).

Almost surely, 2^25649747 is an apocalyptic number.

25649747 is a deficient number, since it is larger than the sum of its proper divisors (1).

25649747 is an equidigital number, since it uses as much as digits as its factorization.

25649747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 44.

The square root of 25649747 is about 5064.5579274010. The cubic root of 25649747 is about 294.9133021106.

The spelling of 25649747 in words is "twenty-five million, six hundred forty-nine thousand, seven hundred forty-seven".