25198279 has 2 divisors, whose sum is σ = 25198280. Its totient is φ = 25198278.

The previous prime is 25198249. The next prime is 25198289. The reversal of 25198279 is 97289152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25198279 - 2¹¹ = 25196231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25198249) 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, 12599139 + 12599140.

It is an arithmetic number, because the mean of its divisors is an integer number (12599140).

Almost surely, 2^25198279 is an apocalyptic number.

25198279 is a deficient number, since it is larger than the sum of its proper divisors (1).

25198279 is an equidigital number, since it uses as much as digits as its factorization.

25198279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 43.

The square root of 25198279 is about 5019.7887405746. The cubic root of 25198279 is about 293.1727675256.

The spelling of 25198279 in words is "twenty-five million, one hundred ninety-eight thousand, two hundred seventy-nine".