27172079 has 4 divisors (see below), whose sum is σ = 29642280. Its totient is φ = 24701880.

The previous prime is 27172009. The next prime is 27172099. The reversal of 27172079 is 97027172.

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 27172079 - 2¹⁶ = 27106543 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 (27172009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235084 + ... + 1235105.

It is an arithmetic number, because the mean of its divisors is an integer number (7410570).

Almost surely, 2^27172079 is an apocalyptic number.

27172079 is a deficient number, since it is larger than the sum of its proper divisors (2470201).

27172079 is a wasteful number, since it uses less digits than its factorization.

27172079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470200.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 27172079 is about 5212.6844331880. The cubic root of 27172079 is about 300.6359804398.

The spelling of 27172079 in words is "twenty-seven million, one hundred seventy-two thousand, seventy-nine".