26900989 has 2 divisors, whose sum is σ = 26900990. Its totient is φ = 26900988.

The previous prime is 26900983. The next prime is 26900999. The reversal of 26900989 is 98900962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20775364 + 6125625 = 4558^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 26900989 - 2¹¹ = 26898941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26900983) 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, 13450494 + 13450495.

It is an arithmetic number, because the mean of its divisors is an integer number (13450495).

Almost surely, 2^26900989 is an apocalyptic number.

It is an amenable number.

26900989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26900989 is an equidigital number, since it uses as much as digits as its factorization.

26900989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 26900989 is about 5186.6163343745. The cubic root of 26900989 is about 299.6328434294.

It can be divided in two parts, 26900 and 989, that added together give a square (27889 = 167²).

The spelling of 26900989 in words is "twenty-six million, nine hundred thousand, nine hundred eighty-nine".