26601997 has 2 divisors, whose sum is σ = 26601998. Its totient is φ = 26601996.

The previous prime is 26601983. The next prime is 26602021. The reversal of 26601997 is 79910662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 6405961 = 4494^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 26601997 - 2¹¹ = 26599949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26601977) 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, 13300998 + 13300999.

It is an arithmetic number, because the mean of its divisors is an integer number (13300999).

Almost surely, 2^26601997 is an apocalyptic number.

It is an amenable number.

26601997 is a deficient number, since it is larger than the sum of its proper divisors (1).

26601997 is an equidigital number, since it uses as much as digits as its factorization.

26601997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 26601997 is about 5157.7123805036. The cubic root of 26601997 is about 298.5186118188.

The spelling of 26601997 in words is "twenty-six million, six hundred one thousand, nine hundred ninety-seven".