26890637 has 2 divisors, whose sum is σ = 26890638. Its totient is φ = 26890636.

The previous prime is 26890621. The next prime is 26890639. The reversal of 26890637 is 73609862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20484676 + 6405961 = 4526^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 26890637 - 2⁴ = 26890621 is a prime.

Together with 26890639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26890594 and 26890603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26890639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445318 + 13445319.

It is an arithmetic number, because the mean of its divisors is an integer number (13445319).

Almost surely, 2^26890637 is an apocalyptic number.

It is an amenable number.

26890637 is a deficient number, since it is larger than the sum of its proper divisors (1).

26890637 is an equidigital number, since it uses as much as digits as its factorization.

26890637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 26890637 is about 5185.6182852192. The cubic root of 26890637 is about 299.5944037379.

The spelling of 26890637 in words is "twenty-six million, eight hundred ninety thousand, six hundred thirty-seven".