26981887 has 2 divisors, whose sum is σ = 26981888. Its totient is φ = 26981886.

The previous prime is 26981849. The next prime is 26981909. The reversal of 26981887 is 78818962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26981887 - 2¹¹ = 26979839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26981887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26981827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13490943 + 13490944.

It is an arithmetic number, because the mean of its divisors is an integer number (13490944).

Almost surely, 2^26981887 is an apocalyptic number.

26981887 is a deficient number, since it is larger than the sum of its proper divisors (1).

26981887 is an equidigital number, since it uses as much as digits as its factorization.

26981887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 49.

The square root of 26981887 is about 5194.4092060599. The cubic root of 26981887 is about 299.9328998078.

The spelling of 26981887 in words is "twenty-six million, nine hundred eighty-one thousand, eight hundred eighty-seven".