26890531 has 2 divisors, whose sum is σ = 26890532. Its totient is φ = 26890530.

The previous prime is 26890483. The next prime is 26890537. The reversal of 26890531 is 13509862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26890531 is a prime.

It is a super-3 number, since 3×26890531³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (26890537) 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, 13445265 + 13445266.

It is an arithmetic number, because the mean of its divisors is an integer number (13445266).

Almost surely, 2^26890531 is an apocalyptic number.

26890531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26890531 is an equidigital number, since it uses as much as digits as its factorization.

26890531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 26890531 is about 5185.6080646343. The cubic root of 26890531 is about 299.5940100811.

The spelling of 26890531 in words is "twenty-six million, eight hundred ninety thousand, five hundred thirty-one".