27155797 has 8 divisors (see below), whose sum is σ = 27703832. Its totient is φ = 26611200.

The previous prime is 27155771. The next prime is 27155813. The reversal of 27155797 is 79755172.

It can be written as a sum of positive squares in 4 ways, for example, as 1359556 + 25796241 = 1166^2 + 5079^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27155797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27155717) 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, 19897 + ... + 21217.

It is an arithmetic number, because the mean of its divisors is an integer number (3462979).

Almost surely, 2^27155797 is an apocalyptic number.

It is an amenable number.

27155797 is a deficient number, since it is larger than the sum of its proper divisors (548035).

27155797 is a wasteful number, since it uses less digits than its factorization.

27155797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719.

The product of its digits is 154350, while the sum is 43.

The square root of 27155797 is about 5211.1224318759. The cubic root of 27155797 is about 300.5759196071.

It can be divided in two parts, 2715 and 5797, that multiplied together give a triangular number (15738855 = T₅₆₁₀).

The spelling of 27155797 in words is "twenty-seven million, one hundred fifty-five thousand, seven hundred ninety-seven".