25905169 has 2 divisors, whose sum is σ = 25905170. Its totient is φ = 25905168.

The previous prime is 25905133. The next prime is 25905197. The reversal of 25905169 is 96150952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21743569 + 4161600 = 4663^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 25905169 - 2¹³ = 25896977 is a prime.

It is a super-2 number, since 2×25905169² = 1342155561837122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25905469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12952584 + 12952585.

It is an arithmetic number, because the mean of its divisors is an integer number (12952585).

Almost surely, 2^25905169 is an apocalyptic number.

It is an amenable number.

25905169 is a deficient number, since it is larger than the sum of its proper divisors (1).

25905169 is an equidigital number, since it uses as much as digits as its factorization.

25905169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 25905169 is about 5089.7120743712. The cubic root of 25905169 is about 295.8889931023. Note that the first 3 decimals are identical.

The spelling of 25905169 in words is "twenty-five million, nine hundred five thousand, one hundred sixty-nine".