27992797 has 4 divisors (see below), whose sum is σ = 31991776. Its totient is φ = 23993820.

The previous prime is 27992773. The next prime is 27992813. The reversal of 27992797 is 79729972.

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 27992797 - 2¹¹ = 27990749 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 (27992747) 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, 1999479 + ... + 1999492.

It is an arithmetic number, because the mean of its divisors is an integer number (7997944).

Almost surely, 2^27992797 is an apocalyptic number.

It is an amenable number.

27992797 is a deficient number, since it is larger than the sum of its proper divisors (3998979).

27992797 is an equidigital number, since it uses as much as digits as its factorization.

27992797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998978.

The product of its digits is 1000188, while the sum is 52.

The square root of 27992797 is about 5290.8219588264. The cubic root of 27992797 is about 303.6328562040.

The spelling of 27992797 in words is "twenty-seven million, nine hundred ninety-two thousand, seven hundred ninety-seven".