25361969 has 2 divisors, whose sum is σ = 25361970. Its totient is φ = 25361968.

The previous prime is 25361933. The next prime is 25361971. The reversal of 25361969 is 96916352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18601969 + 6760000 = 4313^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 25361969 - 2¹² = 25357873 is a prime.

It is a super-2 number, since 2×25361969² = 1286458943113922, which contains 22 as substring.

Together with 25361971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25361929) 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, 12680984 + 12680985.

It is an arithmetic number, because the mean of its divisors is an integer number (12680985).

Almost surely, 2^25361969 is an apocalyptic number.

It is an amenable number.

25361969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361969 is an equidigital number, since it uses as much as digits as its factorization.

25361969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 41.

The square root of 25361969 is about 5036.0668184606. The cubic root of 25361969 is about 293.8062222853.

The spelling of 25361969 in words is "twenty-five million, three hundred sixty-one thousand, nine hundred sixty-nine".