27997477 has 8 divisors (see below), whose sum is σ = 28941696. Its totient is φ = 27067872.

The previous prime is 27997421. The next prime is 27997481. The reversal of 27997477 is 77479972.

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

It is a cyclic number.

It is not a de Polignac number, because 27997477 - 2⁷ = 27997349 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 (27997577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313 + ... + 7489.

It is an arithmetic number, because the mean of its divisors is an integer number (3617712).

Almost surely, 2^27997477 is an apocalyptic number.

It is an amenable number.

27997477 is a deficient number, since it is larger than the sum of its proper divisors (944219).

27997477 is an equidigital number, since it uses as much as digits as its factorization.

27997477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7307.

The product of its digits is 1555848, while the sum is 52.

The square root of 27997477 is about 5291.2642156672. The cubic root of 27997477 is about 303.6497763017.

The spelling of 27997477 in words is "twenty-seven million, nine hundred ninety-seven thousand, four hundred seventy-seven".