25601623 has 2 divisors, whose sum is σ = 25601624. Its totient is φ = 25601622.

The previous prime is 25601603. The next prime is 25601633. The reversal of 25601623 is 32610652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25601623 - 2⁹ = 25601111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25601603) 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, 12800811 + 12800812.

It is an arithmetic number, because the mean of its divisors is an integer number (12800812).

Almost surely, 2^25601623 is an apocalyptic number.

25601623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601623 is an equidigital number, since it uses as much as digits as its factorization.

25601623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25601623 is about 5059.8046404975. The cubic root of 25601623 is about 294.7287480754.

The spelling of 25601623 in words is "twenty-five million, six hundred one thousand, six hundred twenty-three".