26238691 has 2 divisors, whose sum is σ = 26238692. Its totient is φ = 26238690.

The previous prime is 26238683. The next prime is 26238727. The reversal of 26238691 is 19683262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26238691 - 2³ = 26238683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26238691.

It is not a weakly prime, because it can be changed into another prime (26238991) 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, 13119345 + 13119346.

It is an arithmetic number, because the mean of its divisors is an integer number (13119346).

Almost surely, 2^26238691 is an apocalyptic number.

26238691 is a deficient number, since it is larger than the sum of its proper divisors (1).

26238691 is an equidigital number, since it uses as much as digits as its factorization.

26238691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 26238691 is about 5122.3716186938. The cubic root of 26238691 is about 297.1534122611.

The spelling of 26238691 in words is "twenty-six million, two hundred thirty-eight thousand, six hundred ninety-one".