25916447 has 2 divisors, whose sum is σ = 25916448. Its totient is φ = 25916446.

The previous prime is 25916419. The next prime is 25916467. The reversal of 25916447 is 74461952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25916447 - 2⁶ = 25916383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25916447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25916467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12958223 + 12958224.

It is an arithmetic number, because the mean of its divisors is an integer number (12958224).

Almost surely, 2^25916447 is an apocalyptic number.

25916447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25916447 is an equidigital number, since it uses as much as digits as its factorization.

25916447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 25916447 is about 5090.8198750300. The cubic root of 25916447 is about 295.9319260001.

The spelling of 25916447 in words is "twenty-five million, nine hundred sixteen thousand, four hundred forty-seven".