25653623 has 2 divisors, whose sum is σ = 25653624. Its totient is φ = 25653622.

The previous prime is 25653601. The next prime is 25653631. The reversal of 25653623 is 32635652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25653623 - 2⁶ = 25653559 is a prime.

It is a super-2 number, since 2×25653623² = 1316216746052258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25653623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25653923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826811 + 12826812.

It is an arithmetic number, because the mean of its divisors is an integer number (12826812).

Almost surely, 2^25653623 is an apocalyptic number.

25653623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25653623 is an equidigital number, since it uses as much as digits as its factorization.

25653623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 32.

The square root of 25653623 is about 5064.9405722081. The cubic root of 25653623 is about 294.9281564012.

The spelling of 25653623 in words is "twenty-five million, six hundred fifty-three thousand, six hundred twenty-three".