26918987 has 2 divisors, whose sum is σ = 26918988. Its totient is φ = 26918986.

The previous prime is 26918971. The next prime is 26919019. The reversal of 26918987 is 78981962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26918987 - 2⁴ = 26918971 is a prime.

It is a super-2 number, since 2×26918987² = 1449263722212338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26918917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13459493 + 13459494.

It is an arithmetic number, because the mean of its divisors is an integer number (13459494).

Almost surely, 2^26918987 is an apocalyptic number.

26918987 is a deficient number, since it is larger than the sum of its proper divisors (1).

26918987 is an equidigital number, since it uses as much as digits as its factorization.

26918987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 26918987 is about 5188.3510868098. The cubic root of 26918987 is about 299.6996512543.

The spelling of 26918987 in words is "twenty-six million, nine hundred eighteen thousand, nine hundred eighty-seven".