26540997 has 16 divisors (see below), whose sum is σ = 41270400. Its totient is φ = 15165696.

The previous prime is 26540977. The next prime is 26540999. The reversal of 26540997 is 79904562.

It is not a de Polignac number, because 26540997 - 2⁸ = 26540741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26540999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11868 + ... + 13925.

It is an arithmetic number, because the mean of its divisors is an integer number (2579400).

Almost surely, 2^26540997 is an apocalyptic number.

It is an amenable number.

26540997 is a deficient number, since it is larger than the sum of its proper divisors (14729403).

26540997 is an equidigital number, since it uses as much as digits as its factorization.

26540997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25817 (or 25803 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 26540997 is about 5151.7955122462. The cubic root of 26540997 is about 298.2902634022.

The spelling of 26540997 in words is "twenty-six million, five hundred forty thousand, nine hundred ninety-seven".