26391839 has 2 divisors, whose sum is σ = 26391840. Its totient is φ = 26391838.

The previous prime is 26391811. The next prime is 26391853. The reversal of 26391839 is 93819362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26391839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26391796 and 26391805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26391889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13195919 + 13195920.

It is an arithmetic number, because the mean of its divisors is an integer number (13195920).

Almost surely, 2^26391839 is an apocalyptic number.

26391839 is a deficient number, since it is larger than the sum of its proper divisors (1).

26391839 is an equidigital number, since it uses as much as digits as its factorization.

26391839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 26391839 is about 5137.2988038462. The cubic root of 26391839 is about 297.7304252516.

The spelling of 26391839 in words is "twenty-six million, three hundred ninety-one thousand, eight hundred thirty-nine".