26304989 has 2 divisors, whose sum is σ = 26304990. Its totient is φ = 26304988.

The previous prime is 26304979. The next prime is 26304991. The reversal of 26304989 is 98940362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13380964 + 12924025 = 3658^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 26304989 - 2¹² = 26300893 is a prime.

Together with 26304991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26304979) 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, 13152494 + 13152495.

It is an arithmetic number, because the mean of its divisors is an integer number (13152495).

Almost surely, 2^26304989 is an apocalyptic number.

It is an amenable number.

26304989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26304989 is an equidigital number, since it uses as much as digits as its factorization.

26304989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 26304989 is about 5128.8389524336. The cubic root of 26304989 is about 297.4034769135.

The spelling of 26304989 in words is "twenty-six million, three hundred four thousand, nine hundred eighty-nine".