25436623 has 2 divisors, whose sum is σ = 25436624. Its totient is φ = 25436622.

The previous prime is 25436603. The next prime is 25436629. The reversal of 25436623 is 32663452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25436623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25436629) 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, 12718311 + 12718312.

It is an arithmetic number, because the mean of its divisors is an integer number (12718312).

Almost surely, 2^25436623 is an apocalyptic number.

25436623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25436623 is an equidigital number, since it uses as much as digits as its factorization.

25436623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 31.

The square root of 25436623 is about 5043.4733071565. The cubic root of 25436623 is about 294.0942167994.

The spelling of 25436623 in words is "twenty-five million, four hundred thirty-six thousand, six hundred twenty-three".