27972797 has 8 divisors (see below), whose sum is σ = 28573176. Its totient is φ = 27378432.

The previous prime is 27972781. The next prime is 27972809. The reversal of 27972797 is 79727972.

It can be written as a sum of positive squares in 4 ways, for example, as 8797156 + 19175641 = 2966^2 + 4379^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 27972797 - 2⁴ = 27972781 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 (27972727) 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, 8603 + ... + 11399.

It is an arithmetic number, because the mean of its divisors is an integer number (3571647).

Almost surely, 2^27972797 is an apocalyptic number.

It is an amenable number.

27972797 is a deficient number, since it is larger than the sum of its proper divisors (600379).

27972797 is a wasteful number, since it uses less digits than its factorization.

27972797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its digits is 777924, while the sum is 50.

The square root of 27972797 is about 5288.9315556169. The cubic root of 27972797 is about 303.5605268361.

The spelling of 27972797 in words is "twenty-seven million, nine hundred seventy-two thousand, seven hundred ninety-seven".