26120399 has 2 divisors, whose sum is σ = 26120400. Its totient is φ = 26120398.

The previous prime is 26120389. The next prime is 26120401. The reversal of 26120399 is 99302162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26120399 is a prime.

Together with 26120401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26120309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13060199 + 13060200.

It is an arithmetic number, because the mean of its divisors is an integer number (13060200).

Almost surely, 2^26120399 is an apocalyptic number.

26120399 is a deficient number, since it is larger than the sum of its proper divisors (1).

26120399 is an equidigital number, since it uses as much as digits as its factorization.

26120399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 26120399 is about 5110.8119707146. The cubic root of 26120399 is about 296.7061868545.

The spelling of 26120399 in words is "twenty-six million, one hundred twenty thousand, three hundred ninety-nine".