25905623 has 2 divisors, whose sum is σ = 25905624. Its totient is φ = 25905622.

The previous prime is 25905599. The next prime is 25905629. The reversal of 25905623 is 32650952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25905623 - 2⁶ = 25905559 is a prime.

It is a super-2 number, since 2×25905623² = 1342202606036258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25905623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25905629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12952811 + 12952812.

It is an arithmetic number, because the mean of its divisors is an integer number (12952812).

Almost surely, 2^25905623 is an apocalyptic number.

25905623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25905623 is an equidigital number, since it uses as much as digits as its factorization.

25905623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 25905623 is about 5089.7566739482. The cubic root of 25905623 is about 295.8907216225.

The spelling of 25905623 in words is "twenty-five million, nine hundred five thousand, six hundred twenty-three".