25279487 has 2 divisors, whose sum is σ = 25279488. Its totient is φ = 25279486.

The previous prime is 25279483. The next prime is 25279517. The reversal of 25279487 is 78497252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25279487 - 2² = 25279483 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25279483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639743 + 12639744.

It is an arithmetic number, because the mean of its divisors is an integer number (12639744).

Almost surely, 2^25279487 is an apocalyptic number.

25279487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25279487 is an equidigital number, since it uses as much as digits as its factorization.

25279487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 44.

The square root of 25279487 is about 5027.8710206210. The cubic root of 25279487 is about 293.4873716037.

The spelling of 25279487 in words is "twenty-five million, two hundred seventy-nine thousand, four hundred eighty-seven".