26940691 has 4 divisors (see below), whose sum is σ = 27068584. Its totient is φ = 26812800.

The previous prime is 26940653. The next prime is 26940701. The reversal of 26940691 is 19604962.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26940691 - 2¹¹ = 26938643 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 26940691.

It is not an unprimeable number, because it can be changed into a prime (26940601) 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, 63630 + ... + 64051.

It is an arithmetic number, because the mean of its divisors is an integer number (6767146).

Almost surely, 2^26940691 is an apocalyptic number.

26940691 is a deficient number, since it is larger than the sum of its proper divisors (127893).

26940691 is a wasteful number, since it uses less digits than its factorization.

26940691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127892.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 26940691 is about 5190.4422740264. The cubic root of 26940691 is about 299.7801760011.

The spelling of 26940691 in words is "twenty-six million, nine hundred forty thousand, six hundred ninety-one".