25553929 has 2 divisors, whose sum is σ = 25553930. Its totient is φ = 25553928.

The previous prime is 25553887. The next prime is 25553977. The reversal of 25553929 is 92935552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24482704 + 1071225 = 4948^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 25553929 - 2⁹ = 25553417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25553891 and 25553900.

It is not a weakly prime, because it can be changed into another prime (25553729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776964 + 12776965.

It is an arithmetic number, because the mean of its divisors is an integer number (12776965).

Almost surely, 2^25553929 is an apocalyptic number.

It is an amenable number.

25553929 is a deficient number, since it is larger than the sum of its proper divisors (1).

25553929 is an equidigital number, since it uses as much as digits as its factorization.

25553929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500, while the sum is 40.

The square root of 25553929 is about 5055.0894156286. The cubic root of 25553929 is about 294.5456147523.

The spelling of 25553929 in words is "twenty-five million, five hundred fifty-three thousand, nine hundred twenty-nine".