25489591 has 2 divisors, whose sum is σ = 25489592. Its totient is φ = 25489590.

The previous prime is 25489573. The next prime is 25489601. The reversal of 25489591 is 19598452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25489591 - 2¹³ = 25481399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25489531) 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 as a sum of consecutive naturals, namely, 12744795 + 12744796.

It is an arithmetic number, because the mean of its divisors is an integer number (12744796).

Almost surely, 2^25489591 is an apocalyptic number.

25489591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25489591 is an equidigital number, since it uses as much as digits as its factorization.

25489591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The square root of 25489591 is about 5048.7217194058. The cubic root of 25489591 is about 294.2982111517.

The spelling of 25489591 in words is "twenty-five million, four hundred eighty-nine thousand, five hundred ninety-one".