26971691 has 2 divisors, whose sum is σ = 26971692. Its totient is φ = 26971690.

The previous prime is 26971619. The next prime is 26971729. The reversal of 26971691 is 19617962.

Together with previous prime (26971619) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26971691 - 2¹⁸ = 26709547 is a prime.

It is not a weakly prime, because it can be changed into another prime (26971291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13485845 + 13485846.

It is an arithmetic number, because the mean of its divisors is an integer number (13485846).

Almost surely, 2^26971691 is an apocalyptic number.

26971691 is a deficient number, since it is larger than the sum of its proper divisors (1).

26971691 is an equidigital number, since it uses as much as digits as its factorization.

26971691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 26971691 is about 5193.4276735120. The cubic root of 26971691 is about 299.8951151867.

The spelling of 26971691 in words is "twenty-six million, nine hundred seventy-one thousand, six hundred ninety-one".