27197947 has 4 divisors (see below), whose sum is σ = 31083376. Its totient is φ = 23312520.

The previous prime is 27197941. The next prime is 27197971. The reversal of 27197947 is 74979172.

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

It is not a de Polignac number, because 27197947 - 2¹⁵ = 27165179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27197897 and 27197906.

It is not an unprimeable number, because it can be changed into a prime (27197941) 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, 1942704 + ... + 1942717.

It is an arithmetic number, because the mean of its divisors is an integer number (7770844).

Almost surely, 2^27197947 is an apocalyptic number.

27197947 is a deficient number, since it is larger than the sum of its proper divisors (3885429).

27197947 is an equidigital number, since it uses as much as digits as its factorization.

27197947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885428.

The product of its digits is 222264, while the sum is 46.

The square root of 27197947 is about 5215.1650980578. The cubic root of 27197947 is about 300.7313526658.

The spelling of 27197947 in words is "twenty-seven million, one hundred ninety-seven thousand, nine hundred forty-seven".