27696979 has 4 divisors (see below), whose sum is σ = 28445584. Its totient is φ = 26948376.

The previous prime is 27696971. The next prime is 27696983. The reversal of 27696979 is 97969672.

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

It is a cyclic number.

It is not a de Polignac number, because 27696979 - 2³ = 27696971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27696971) 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, 374247 + ... + 374320.

It is an arithmetic number, because the mean of its divisors is an integer number (7111396).

Almost surely, 2^27696979 is an apocalyptic number.

27696979 is a deficient number, since it is larger than the sum of its proper divisors (748605).

27696979 is an equidigital number, since it uses as much as digits as its factorization.

27696979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748604.

The product of its digits is 2571912, while the sum is 55.

The square root of 27696979 is about 5262.7919396457. The cubic root of 27696979 is about 302.5595047205.

The spelling of 27696979 in words is "twenty-seven million, six hundred ninety-six thousand, nine hundred seventy-nine".