26680139 has 2 divisors, whose sum is σ = 26680140. Its totient is φ = 26680138.

The previous prime is 26680133. The next prime is 26680151. The reversal of 26680139 is 93108662.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26680139 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26680099 and 26680108.

It is not a weakly prime, because it can be changed into another prime (26680133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13340069 + 13340070.

It is an arithmetic number, because the mean of its divisors is an integer number (13340070).

Almost surely, 2^26680139 is an apocalyptic number.

26680139 is a deficient number, since it is larger than the sum of its proper divisors (1).

26680139 is an equidigital number, since it uses as much as digits as its factorization.

26680139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 26680139 is about 5165.2820832942. The cubic root of 26680139 is about 298.8106204488.

The spelling of 26680139 in words is "twenty-six million, six hundred eighty thousand, one hundred thirty-nine".