26391193 has 2 divisors, whose sum is σ = 26391194. Its totient is φ = 26391192.

The previous prime is 26391163. The next prime is 26391251. The reversal of 26391193 is 39119362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18079504 + 8311689 = 4252^2 + 2883^2 .

It is a cyclic number.

It is not a de Polignac number, because 26391193 - 2⁵ = 26391161 is a prime.

It is equal to p_1647376 and since 26391193 and 1647376 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (26391163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13195596 + 13195597.

It is an arithmetic number, because the mean of its divisors is an integer number (13195597).

Almost surely, 2^26391193 is an apocalyptic number.

It is an amenable number.

26391193 is a deficient number, since it is larger than the sum of its proper divisors (1).

26391193 is an equidigital number, since it uses as much as digits as its factorization.

26391193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 34.

The square root of 26391193 is about 5137.2359299530. The cubic root of 26391193 is about 297.7279960231.

The spelling of 26391193 in words is "twenty-six million, three hundred ninety-one thousand, one hundred ninety-three".