27739979 has 8 divisors (see below), whose sum is σ = 28782000. Its totient is φ = 26703712.

The previous prime is 27739969. The next prime is 27739997. The reversal of 27739979 is 97993772.

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-27739979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27739979.

It is not an unprimeable number, because it can be changed into a prime (27739919) 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, 10052 + ... + 12510.

It is an arithmetic number, because the mean of its divisors is an integer number (3597750).

Almost surely, 2^27739979 is an apocalyptic number.

27739979 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

27739979 is a deficient number, since it is larger than the sum of its proper divisors (1042021).

27739979 is a wasteful number, since it uses less digits than its factorization.

27739979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877.

The product of its digits is 1500282, while the sum is 53.

The square root of 27739979 is about 5266.8756393141. The cubic root of 27739979 is about 302.7159999076.

The spelling of 27739979 in words is "twenty-seven million, seven hundred thirty-nine thousand, nine hundred seventy-nine".