26998121 has 2 divisors, whose sum is σ = 26998122. Its totient is φ = 26998120.

The previous prime is 26998099. The next prime is 26998129. The reversal of 26998121 is 12189962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24552025 + 2446096 = 4955^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 26998121 - 2¹⁰ = 26997097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26998129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13499060 + 13499061.

It is an arithmetic number, because the mean of its divisors is an integer number (13499061).

Almost surely, 2^26998121 is an apocalyptic number.

It is an amenable number.

26998121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26998121 is an equidigital number, since it uses as much as digits as its factorization.

26998121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 26998121 is about 5195.9716127015. The cubic root of 26998121 is about 299.9930405793.

The spelling of 26998121 in words is "twenty-six million, nine hundred ninety-eight thousand, one hundred twenty-one".