25506973 has 2 divisors, whose sum is σ = 25506974. Its totient is φ = 25506972.

The previous prime is 25506937. The next prime is 25506983. The reversal of 25506973 is 37960552.

Together with previous prime (25506937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24870169 + 636804 = 4987^2 + 798^2 .

It is a cyclic number.

It is not a de Polignac number, because 25506973 - 2⁹ = 25506461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25506983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753486 + 12753487.

It is an arithmetic number, because the mean of its divisors is an integer number (12753487).

Almost surely, 2^25506973 is an apocalyptic number.

It is an amenable number.

25506973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506973 is an equidigital number, since it uses as much as digits as its factorization.

25506973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 25506973 is about 5050.4428518695. The cubic root of 25506973 is about 294.3650924282.

The spelling of 25506973 in words is "twenty-five million, five hundred six thousand, nine hundred seventy-three".