26597997 has 16 divisors (see below), whose sum is σ = 40150080. Its totient is φ = 17396496.

The previous prime is 26597993. The next prime is 26598001. The reversal of 26597997 is 79979562.

It is an interprime number because it is at equal distance from previous prime (26597993) and next prime (26598001).

It is not a de Polignac number, because 26597997 - 2² = 26597993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26597993) 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, 7863 + ... + 10724.

It is an arithmetic number, because the mean of its divisors is an integer number (2509380).

Almost surely, 2^26597997 is an apocalyptic number.

26597997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

26597997 is a deficient number, since it is larger than the sum of its proper divisors (13552083).

26597997 is a wasteful number, since it uses less digits than its factorization.

26597997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18649 (or 18643 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 26597997 is about 5157.3245971143. The cubic root of 26597997 is about 298.5036488532.

The spelling of 26597997 in words is "twenty-six million, five hundred ninety-seven thousand, nine hundred ninety-seven".