25535623 has 2 divisors, whose sum is σ = 25535624. Its totient is φ = 25535622.

The previous prime is 25535621. The next prime is 25535633. The reversal of 25535623 is 32653552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25535623 - 2¹ = 25535621 is a prime.

Together with 25535621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25535621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12767811 + 12767812.

It is an arithmetic number, because the mean of its divisors is an integer number (12767812).

Almost surely, 2^25535623 is an apocalyptic number.

25535623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25535623 is an equidigital number, since it uses as much as digits as its factorization.

25535623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 31.

The square root of 25535623 is about 5053.2784407749. The cubic root of 25535623 is about 294.4752636649.

The spelling of 25535623 in words is "twenty-five million, five hundred thirty-five thousand, six hundred twenty-three".