26897391 has 12 divisors (see below), whose sum is σ = 38973480. Its totient is φ = 17875440.

The previous prime is 26897389. The next prime is 26897441. The reversal of 26897391 is 19379862.

It is not a de Polignac number, because 26897391 - 2¹ = 26897389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26897371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1536 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (3247790).

Almost surely, 2^26897391 is an apocalyptic number.

26897391 is a deficient number, since it is larger than the sum of its proper divisors (12076089).

26897391 is a wasteful number, since it uses less digits than its factorization.

26897391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9366 (or 9363 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 26897391 is about 5186.2694685101. The cubic root of 26897391 is about 299.6194842299.

The spelling of 26897391 in words is "twenty-six million, eight hundred ninety-seven thousand, three hundred ninety-one".