26305691 has 2 divisors, whose sum is σ = 26305692. Its totient is φ = 26305690.

The previous prime is 26305687. The next prime is 26305693. The reversal of 26305691 is 19650362.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26305691 - 2² = 26305687 is a prime.

Together with 26305693, 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 (26305693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13152845 + 13152846.

It is an arithmetic number, because the mean of its divisors is an integer number (13152846).

Almost surely, 2^26305691 is an apocalyptic number.

26305691 is a deficient number, since it is larger than the sum of its proper divisors (1).

26305691 is an equidigital number, since it uses as much as digits as its factorization.

26305691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 26305691 is about 5128.9073885185. The cubic root of 26305691 is about 297.4061224875.

The spelling of 26305691 in words is "twenty-six million, three hundred five thousand, six hundred ninety-one".