26697397 has 2 divisors, whose sum is σ = 26697398. Its totient is φ = 26697396.

The previous prime is 26697389. The next prime is 26697403. The reversal of 26697397 is 79379662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20738916 + 5958481 = 4554^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 26697397 - 2³ = 26697389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26697397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26697317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13348698 + 13348699.

It is an arithmetic number, because the mean of its divisors is an integer number (13348699).

Almost surely, 2^26697397 is an apocalyptic number.

It is an amenable number.

26697397 is a deficient number, since it is larger than the sum of its proper divisors (1).

26697397 is an equidigital number, since it uses as much as digits as its factorization.

26697397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 49.

The square root of 26697397 is about 5166.9523899490. The cubic root of 26697397 is about 298.8750349331.

The spelling of 26697397 in words is "twenty-six million, six hundred ninety-seven thousand, three hundred ninety-seven".