26907989 has 2 divisors, whose sum is σ = 26907990. Its totient is φ = 26907988.

The previous prime is 26907973. The next prime is 26907997. The reversal of 26907989 is 98970962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 2007889 = 4990^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 26907989 - 2⁴ = 26907973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26907929) 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, 13453994 + 13453995.

It is an arithmetic number, because the mean of its divisors is an integer number (13453995).

Almost surely, 2^26907989 is an apocalyptic number.

It is an amenable number.

26907989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26907989 is an equidigital number, since it uses as much as digits as its factorization.

26907989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 26907989 is about 5187.2911042277. The cubic root of 26907989 is about 299.6588306772.

The spelling of 26907989 in words is "twenty-six million, nine hundred seven thousand, nine hundred eighty-nine".