26257397 has 2 divisors, whose sum is σ = 26257398. Its totient is φ = 26257396.

The previous prime is 26257393. The next prime is 26257417. The reversal of 26257397 is 79375262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14485636 + 11771761 = 3806^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 26257397 - 2² = 26257393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26257393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13128698 + 13128699.

It is an arithmetic number, because the mean of its divisors is an integer number (13128699).

Almost surely, 2^26257397 is an apocalyptic number.

It is an amenable number.

26257397 is a deficient number, since it is larger than the sum of its proper divisors (1).

26257397 is an equidigital number, since it uses as much as digits as its factorization.

26257397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 41.

The square root of 26257397 is about 5124.1972054167. The cubic root of 26257397 is about 297.2240106931.

The spelling of 26257397 in words is "twenty-six million, two hundred fifty-seven thousand, three hundred ninety-seven".