26942809 has 4 divisors (see below), whose sum is σ = 27078400. Its totient is φ = 26807220.

The previous prime is 26942791. The next prime is 26942837. The reversal of 26942809 is 90824962.

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 26942809 - 2⁷ = 26942681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26942849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67497 + ... + 67894.

It is an arithmetic number, because the mean of its divisors is an integer number (6769600).

Almost surely, 2^26942809 is an apocalyptic number.

It is an amenable number.

26942809 is a deficient number, since it is larger than the sum of its proper divisors (135591).

26942809 is a wasteful number, since it uses less digits than its factorization.

26942809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135590.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 26942809 is about 5190.6462988726. The cubic root of 26942809 is about 299.7880317483.

The spelling of 26942809 in words is "twenty-six million, nine hundred forty-two thousand, eight hundred nine".