27057691 has 8 divisors (see below), whose sum is σ = 28803600. Its totient is φ = 25344000.

The previous prime is 27057689. The next prime is 27057721. The reversal of 27057691 is 19675072.

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

It is a 11-Lehmer number, since φ(27057691) divides (27057691-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 27057691 - 2¹ = 27057689 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 27057691.

It is not an unprimeable number, because it can be changed into a prime (27057631) 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, 6310 + ... + 9691.

It is an arithmetic number, because the mean of its divisors is an integer number (3600450).

Almost surely, 2^27057691 is an apocalyptic number.

27057691 is a deficient number, since it is larger than the sum of its proper divisors (1745909).

27057691 is a wasteful number, since it uses less digits than its factorization.

27057691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16109.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 27057691 is about 5201.7007795528. The cubic root of 27057691 is about 300.2135183673.

The spelling of 27057691 in words is "twenty-seven million, fifty-seven thousand, six hundred ninety-one".