26861977 has 2 divisors, whose sum is σ = 26861978. Its totient is φ = 26861976.

The previous prime is 26861959. The next prime is 26861981. The reversal of 26861977 is 77916862.

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., 24314761 + 2547216 = 4931^2 + 1596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26861977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26861987) 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, 13430988 + 13430989.

It is an arithmetic number, because the mean of its divisors is an integer number (13430989).

Almost surely, 2^26861977 is an apocalyptic number.

It is an amenable number.

26861977 is a deficient number, since it is larger than the sum of its proper divisors (1).

26861977 is an equidigital number, since it uses as much as digits as its factorization.

26861977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 26861977 is about 5182.8541364773. The cubic root of 26861977 is about 299.4879301492.

The spelling of 26861977 in words is "twenty-six million, eight hundred sixty-one thousand, nine hundred seventy-seven".