26778133 has 2 divisors, whose sum is σ = 26778134. Its totient is φ = 26778132.

The previous prime is 26778127. The next prime is 26778137. The reversal of 26778133 is 33187762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 6770404 = 4473^2 + 2602^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26778133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26778092 and 26778101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26778137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13389066 + 13389067.

It is an arithmetic number, because the mean of its divisors is an integer number (13389067).

Almost surely, 2^26778133 is an apocalyptic number.

It is an amenable number.

26778133 is a deficient number, since it is larger than the sum of its proper divisors (1).

26778133 is an equidigital number, since it uses as much as digits as its factorization.

26778133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 26778133 is about 5174.7592214518. The cubic root of 26778133 is about 299.1760092399.

It can be divided in two parts, 267 and 78133, that added together give a square (78400 = 280²).

The spelling of 26778133 in words is "twenty-six million, seven hundred seventy-eight thousand, one hundred thirty-three".