26808143 has 2 divisors, whose sum is σ = 26808144. Its totient is φ = 26808142.

The previous prime is 26808139. The next prime is 26808169. The reversal of 26808143 is 34180862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26808143 - 2² = 26808139 is a prime.

It is a super-2 number, since 2×26808143² = 1437353062216898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26808043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13404071 + 13404072.

It is an arithmetic number, because the mean of its divisors is an integer number (13404072).

Almost surely, 2^26808143 is an apocalyptic number.

26808143 is a deficient number, since it is larger than the sum of its proper divisors (1).

26808143 is an equidigital number, since it uses as much as digits as its factorization.

26808143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 26808143 is about 5177.6580613246. The cubic root of 26808143 is about 299.2877287558.

The spelling of 26808143 in words is "twenty-six million, eight hundred eight thousand, one hundred forty-three".