26399057 has 2 divisors, whose sum is σ = 26399058. Its totient is φ = 26399056.

The previous prime is 26399047. The next prime is 26399059. The reversal of 26399057 is 75099362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26306641 + 92416 = 5129^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 26399057 - 2⁶ = 26398993 is a prime.

Together with 26399059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26399059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13199528 + 13199529.

It is an arithmetic number, because the mean of its divisors is an integer number (13199529).

Almost surely, 2^26399057 is an apocalyptic number.

It is an amenable number.

26399057 is a deficient number, since it is larger than the sum of its proper divisors (1).

26399057 is an equidigital number, since it uses as much as digits as its factorization.

26399057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 26399057 is about 5138.0012650835. The cubic root of 26399057 is about 297.7575652363.

The spelling of 26399057 in words is "twenty-six million, three hundred ninety-nine thousand, fifty-seven".