25803623 has 2 divisors, whose sum is σ = 25803624. Its totient is φ = 25803622.

The previous prime is 25803619. The next prime is 25803641. The reversal of 25803623 is 32630852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25803623 - 2² = 25803619 is a prime.

It is a super-2 number, since 2×25803623² = 1331653919852258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25803683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901811 + 12901812.

It is an arithmetic number, because the mean of its divisors is an integer number (12901812).

Almost surely, 2^25803623 is an apocalyptic number.

25803623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25803623 is an equidigital number, since it uses as much as digits as its factorization.

25803623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 25803623 is about 5079.7266658748. The cubic root of 25803623 is about 295.5018671572.

The spelling of 25803623 in words is "twenty-five million, eight hundred three thousand, six hundred twenty-three".