26720143 has 2 divisors, whose sum is σ = 26720144. Its totient is φ = 26720142.

The previous prime is 26720129. The next prime is 26720153. The reversal of 26720143 is 34102762.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26720143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26720123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360071 + 13360072.

It is an arithmetic number, because the mean of its divisors is an integer number (13360072).

Almost surely, 2^26720143 is an apocalyptic number.

26720143 is a deficient number, since it is larger than the sum of its proper divisors (1).

26720143 is an equidigital number, since it uses as much as digits as its factorization.

26720143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 26720143 is about 5169.1530253998. The cubic root of 26720143 is about 298.9598906687.

The spelling of 26720143 in words is "twenty-six million, seven hundred twenty thousand, one hundred forty-three".