26720839 has 2 divisors, whose sum is σ = 26720840. Its totient is φ = 26720838.

The previous prime is 26720833. The next prime is 26720843. The reversal of 26720839 is 93802762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26720839 - 2³ = 26720831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26720798 and 26720807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26720831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360419 + 13360420.

It is an arithmetic number, because the mean of its divisors is an integer number (13360420).

Almost surely, 2^26720839 is an apocalyptic number.

26720839 is a deficient number, since it is larger than the sum of its proper divisors (1).

26720839 is an equidigital number, since it uses as much as digits as its factorization.

26720839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 26720839 is about 5169.2203474025. The cubic root of 26720839 is about 298.9624863918.

The spelling of 26720839 in words is "twenty-six million, seven hundred twenty thousand, eight hundred thirty-nine".