25473439 has 2 divisors, whose sum is σ = 25473440. Its totient is φ = 25473438.

The previous prime is 25473431. The next prime is 25473473. The reversal of 25473439 is 93437452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25473439 - 2³ = 25473431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25473398 and 25473407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25473431) 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, 12736719 + 12736720.

It is an arithmetic number, because the mean of its divisors is an integer number (12736720).

Almost surely, 2^25473439 is an apocalyptic number.

25473439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25473439 is an equidigital number, since it uses as much as digits as its factorization.

25473439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 25473439 is about 5047.1218530961. The cubic root of 25473439 is about 294.2360353258.

The spelling of 25473439 in words is "twenty-five million, four hundred seventy-three thousand, four hundred thirty-nine".