26563397 has 4 divisors (see below), whose sum is σ = 30358176. Its totient is φ = 22768620.

The previous prime is 26563363. The next prime is 26563399. The reversal of 26563397 is 79336562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79336562 = 2 ⋅39668281.

It is not a de Polignac number, because 26563397 - 2¹² = 26559301 is a prime.

It is a super-2 number, since 2×26563397² = 1411228120359218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26563399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1897379 + ... + 1897392.

It is an arithmetic number, because the mean of its divisors is an integer number (7589544).

Almost surely, 2^26563397 is an apocalyptic number.

It is an amenable number.

26563397 is a deficient number, since it is larger than the sum of its proper divisors (3794779).

26563397 is an equidigital number, since it uses as much as digits as its factorization.

26563397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794778.

The product of its digits is 204120, while the sum is 41.

The square root of 26563397 is about 5153.9690530697. The cubic root of 26563397 is about 298.3741565461.

The spelling of 26563397 in words is "twenty-six million, five hundred sixty-three thousand, three hundred ninety-seven".