25506373 has 2 divisors, whose sum is σ = 25506374. Its totient is φ = 25506372.

The previous prime is 25506367. The next prime is 25506413. The reversal of 25506373 is 37360552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20412324 + 5094049 = 4518^2 + 2257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25506373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25506323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12753186 + 12753187.

It is an arithmetic number, because the mean of its divisors is an integer number (12753187).

Almost surely, 2^25506373 is an apocalyptic number.

It is an amenable number.

25506373 is a deficient number, since it is larger than the sum of its proper divisors (1).

25506373 is an equidigital number, since it uses as much as digits as its factorization.

25506373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 25506373 is about 5050.3834507887. The cubic root of 25506373 is about 294.3627842954.

The spelling of 25506373 in words is "twenty-five million, five hundred six thousand, three hundred seventy-three".