25629473 has 2 divisors, whose sum is σ = 25629474. Its totient is φ = 25629472.

The previous prime is 25629407. The next prime is 25629479. The reversal of 25629473 is 37492652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23931664 + 1697809 = 4892^2 + 1303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25629473 is a prime.

It is not a weakly prime, because it can be changed into another prime (25629479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12814736 + 12814737.

It is an arithmetic number, because the mean of its divisors is an integer number (12814737).

Almost surely, 2^25629473 is an apocalyptic number.

It is an amenable number.

25629473 is a deficient number, since it is larger than the sum of its proper divisors (1).

25629473 is an equidigital number, since it uses as much as digits as its factorization.

25629473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 25629473 is about 5062.5559749992. Note that the first 3 decimals coincide. The cubic root of 25629473 is about 294.8355801185.

The spelling of 25629473 in words is "twenty-five million, six hundred twenty-nine thousand, four hundred seventy-three".