27499979 has 8 divisors (see below), whose sum is σ = 29991360. Its totient is φ = 25062336.

The previous prime is 27499921. The next prime is 27499981. The reversal of 27499979 is 97999472.

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

It is not a de Polignac number, because 27499979 - 2¹² = 27495883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27499379) 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, 12362 + ... + 14415.

It is an arithmetic number, because the mean of its divisors is an integer number (3748920).

Almost surely, 2^27499979 is an apocalyptic number.

27499979 is a deficient number, since it is larger than the sum of its proper divisors (2491381).

27499979 is a wasteful number, since it uses less digits than its factorization.

27499979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26869.

The product of its digits is 2571912, while the sum is 56.

The square root of 27499979 is about 5244.0422385789. The cubic root of 27499979 is about 301.8404600077.

It can be divided in two parts, 274999 and 79, that multiplied together give a square (21724921 = 4661²).

The spelling of 27499979 in words is "twenty-seven million, four hundred ninety-nine thousand, nine hundred seventy-nine".