26887979 has 2 divisors, whose sum is σ = 26887980. Its totient is φ = 26887978.

The previous prime is 26887963. The next prime is 26887997. The reversal of 26887979 is 97978862.

Together with next prime (26887997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26887979 - 2⁴ = 26887963 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26887909) 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, 13443989 + 13443990.

It is an arithmetic number, because the mean of its divisors is an integer number (13443990).

Almost surely, 2^26887979 is an apocalyptic number.

26887979 is a deficient number, since it is larger than the sum of its proper divisors (1).

26887979 is an equidigital number, since it uses as much as digits as its factorization.

26887979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 56.

The square root of 26887979 is about 5185.3619931496. The cubic root of 26887979 is about 299.5845322950.

The spelling of 26887979 in words is "twenty-six million, eight hundred eighty-seven thousand, nine hundred seventy-nine".