26149891 has 8 divisors (see below), whose sum is σ = 27062640. Its totient is φ = 25251072.

The previous prime is 26149889. The next prime is 26149901. The reversal of 26149891 is 19894162.

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

It is a cyclic number.

It is not a de Polignac number, because 26149891 - 2¹ = 26149889 is a prime.

It is a Duffinian number.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (26149801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (3382830).

Almost surely, 2^26149891 is an apocalyptic number.

26149891 is a deficient number, since it is larger than the sum of its proper divisors (912749).

26149891 is an equidigital number, since it uses as much as digits as its factorization.

26149891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6965.

The product of its digits is 31104, while the sum is 40.

The square root of 26149891 is about 5113.6964125767. The cubic root of 26149891 is about 296.8178131178.

The spelling of 26149891 in words is "twenty-six million, one hundred forty-nine thousand, eight hundred ninety-one".