26621897 has 2 divisors, whose sum is σ = 26621898. Its totient is φ = 26621896.

The previous prime is 26621893. The next prime is 26621899. The reversal of 26621897 is 79812662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19882681 + 6739216 = 4459^2 + 2596^2 .

It is a cyclic number.

It is not a de Polignac number, because 26621897 - 2² = 26621893 is a prime.

Together with 26621899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26621891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13310948 + 13310949.

It is an arithmetic number, because the mean of its divisors is an integer number (13310949).

Almost surely, 2^26621897 is an apocalyptic number.

It is an amenable number.

26621897 is a deficient number, since it is larger than the sum of its proper divisors (1).

26621897 is an equidigital number, since it uses as much as digits as its factorization.

26621897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 26621897 is about 5159.6411696939. The cubic root of 26621897 is about 298.5930302881.

The spelling of 26621897 in words is "twenty-six million, six hundred twenty-one thousand, eight hundred ninety-seven".