25506623 has 2 divisors, whose sum is σ = 25506624. Its totient is φ = 25506622.

The previous prime is 25506619. The next prime is 25506643. The reversal of 25506623 is 32660552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25506623 - 2² = 25506619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25506643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753311 + 12753312.

It is an arithmetic number, because the mean of its divisors is an integer number (12753312).

Almost surely, 2^25506623 is an apocalyptic number.

25506623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506623 is an equidigital number, since it uses as much as digits as its factorization.

25506623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 25506623 is about 5050.4082013239. The cubic root of 25506623 is about 294.3637460218.

The spelling of 25506623 in words is "twenty-five million, five hundred six thousand, six hundred twenty-three".