26890837 has 2 divisors, whose sum is σ = 26890838. Its totient is φ = 26890836.

The previous prime is 26890819. The next prime is 26890847. The reversal of 26890837 is 73809862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25542916 + 1347921 = 5054^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 26890837 - 2²³ = 18502229 is a prime.

It is a super-2 number, since 2×26890837² = 1446234229121138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26890793 and 26890802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26890817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445418 + 13445419.

It is an arithmetic number, because the mean of its divisors is an integer number (13445419).

Almost surely, 2^26890837 is an apocalyptic number.

It is an amenable number.

26890837 is a deficient number, since it is larger than the sum of its proper divisors (1).

26890837 is an equidigital number, since it uses as much as digits as its factorization.

26890837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 26890837 is about 5185.6375692869. The cubic root of 26890837 is about 299.5951464838.

The spelling of 26890837 in words is "twenty-six million, eight hundred ninety thousand, eight hundred thirty-seven".