26491013 has 2 divisors, whose sum is σ = 26491014. Its totient is φ = 26491012.

The previous prime is 26490977. The next prime is 26491039. The reversal of 26491013 is 31019462.

It is an a-pointer prime, because the next prime (26491039) can be obtained adding 26491013 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 917764 = 5057^2 + 958^2 .

It is a cyclic number.

It is not a de Polignac number, because 26491013 - 2⁸ = 26490757 is a prime.

It is equal to p_1653263 and since 26491013 and 1653263 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26491313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13245506 + 13245507.

It is an arithmetic number, because the mean of its divisors is an integer number (13245507).

Almost surely, 2^26491013 is an apocalyptic number.

It is an amenable number.

26491013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26491013 is an equidigital number, since it uses as much as digits as its factorization.

26491013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 26491013 is about 5146.9421018698. The cubic root of 26491013 is about 298.1028915155.

The spelling of 26491013 in words is "twenty-six million, four hundred ninety-one thousand, thirteen".