26949409 has 4 divisors (see below), whose sum is σ = 26966016. Its totient is φ = 26932804.

The previous prime is 26949397. The next prime is 26949427. The reversal of 26949409 is 90494962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26949409 - 2¹⁹ = 26425121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26949469) 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 3 ways as a sum of consecutive naturals, for example, 5569 + ... + 9214.

It is an arithmetic number, because the mean of its divisors is an integer number (6741504).

Almost surely, 2^26949409 is an apocalyptic number.

It is an amenable number.

26949409 is a deficient number, since it is larger than the sum of its proper divisors (16607).

26949409 is a wasteful number, since it uses less digits than its factorization.

26949409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16606.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 26949409 is about 5191.2820189236. The cubic root of 26949409 is about 299.8125087738.

The spelling of 26949409 in words is "twenty-six million, nine hundred forty-nine thousand, four hundred nine".