26172647 has 2 divisors, whose sum is σ = 26172648. Its totient is φ = 26172646.

The previous prime is 26172631. The next prime is 26172661. The reversal of 26172647 is 74627162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26172647 - 2⁴ = 26172631 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 (26172667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13086323 + 13086324.

It is an arithmetic number, because the mean of its divisors is an integer number (13086324).

Almost surely, 2^26172647 is an apocalyptic number.

26172647 is a deficient number, since it is larger than the sum of its proper divisors (1).

26172647 is an equidigital number, since it uses as much as digits as its factorization.

26172647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 26172647 is about 5115.9209337127. The cubic root of 26172647 is about 296.9038864893.

The spelling of 26172647 in words is "twenty-six million, one hundred seventy-two thousand, six hundred forty-seven".