26316991 has 8 divisors (see below), whose sum is σ = 27980640. Its totient is φ = 24696672.

The previous prime is 26316943. The next prime is 26317001. The reversal of 26316991 is 19961362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26316991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26316991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26316091) 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 in 7 ways as a sum of consecutive naturals, for example, 9576 + ... + 12013.

It is an arithmetic number, because the mean of its divisors is an integer number (3497580).

Almost surely, 2^26316991 is an apocalyptic number.

26316991 is a deficient number, since it is larger than the sum of its proper divisors (1663649).

26316991 is a wasteful number, since it uses less digits than its factorization.

26316991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21665.

The product of its digits is 17496, while the sum is 37.

The square root of 26316991 is about 5130.0088693880. The cubic root of 26316991 is about 297.4487014626.

The spelling of 26316991 in words is "twenty-six million, three hundred sixteen thousand, nine hundred ninety-one".