26991941 has 2 divisors, whose sum is σ = 26991942. Its totient is φ = 26991940.

The previous prime is 26991919. The next prime is 26991967. The reversal of 26991941 is 14919962.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25715041 + 1276900 = 5071^2 + 1130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26991941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26991901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13495970 + 13495971.

It is an arithmetic number, because the mean of its divisors is an integer number (13495971).

Almost surely, 2^26991941 is an apocalyptic number.

It is an amenable number.

26991941 is a deficient number, since it is larger than the sum of its proper divisors (1).

26991941 is an equidigital number, since it uses as much as digits as its factorization.

26991941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 26991941 is about 5195.3768871950. The cubic root of 26991941 is about 299.9701488817.

The spelling of 26991941 in words is "twenty-six million, nine hundred ninety-one thousand, nine hundred forty-one".