26939609 has 4 divisors (see below), whose sum is σ = 26966016. Its totient is φ = 26913204.

The previous prime is 26939599. The next prime is 26939617. The reversal of 26939609 is 90693962.

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 26939609 - 2⁴ = 26939593 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 26939609.

It is not an unprimeable number, because it can be changed into a prime (26939639) 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, 11609 + ... + 13734.

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

Almost surely, 2^26939609 is an apocalyptic number.

It is an amenable number.

26939609 is a deficient number, since it is larger than the sum of its proper divisors (26407).

26939609 is a wasteful number, since it uses less digits than its factorization.

26939609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26406.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 26939609 is about 5190.3380429409. The cubic root of 26939609 is about 299.7761626607.

The spelling of 26939609 in words is "twenty-six million, nine hundred thirty-nine thousand, six hundred nine".