25194973 has 2 divisors, whose sum is σ = 25194974. Its totient is φ = 25194972.

The previous prime is 25194941. The next prime is 25194977. The reversal of 25194973 is 37949152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14152644 + 11042329 = 3762^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 25194973 - 2⁵ = 25194941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25194977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597486 + 12597487.

It is an arithmetic number, because the mean of its divisors is an integer number (12597487).

Almost surely, 2^25194973 is an apocalyptic number.

It is an amenable number.

25194973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25194973 is an equidigital number, since it uses as much as digits as its factorization.

25194973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 25194973 is about 5019.4594330466. The cubic root of 25194973 is about 293.1599455975.

The spelling of 25194973 in words is "twenty-five million, one hundred ninety-four thousand, nine hundred seventy-three".