25278833 has 2 divisors, whose sum is σ = 25278834. Its totient is φ = 25278832.

The previous prime is 25278821. The next prime is 25278839. The reversal of 25278833 is 33887252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21977344 + 3301489 = 4688^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 25278833 - 2⁸ = 25278577 is a prime.

It is not a weakly prime, because it can be changed into another prime (25278839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639416 + 12639417.

It is an arithmetic number, because the mean of its divisors is an integer number (12639417).

Almost surely, 2^25278833 is an apocalyptic number.

It is an amenable number.

25278833 is a deficient number, since it is larger than the sum of its proper divisors (1).

25278833 is an equidigital number, since it uses as much as digits as its factorization.

25278833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 25278833 is about 5027.8059827324. The cubic root of 25278833 is about 293.4848406663.

The spelling of 25278833 in words is "twenty-five million, two hundred seventy-eight thousand, eight hundred thirty-three".