27977983 has 6 divisors (see below), whose sum is σ = 30752792. Its totient is φ = 25434420.

The previous prime is 27977981. The next prime is 27978017. The reversal of 27977983 is 38977972.

It is a happy number.

It is not a de Polignac number, because 27977983 - 2¹ = 27977981 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 27977983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27977981) 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 5 ways as a sum of consecutive naturals, for example, 115491 + ... + 115732.

Almost surely, 2^27977983 is an apocalyptic number.

27977983 is a deficient number, since it is larger than the sum of its proper divisors (2774809).

27977983 is a wasteful number, since it uses less digits than its factorization.

27977983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231245 (or 231234 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 52.

The square root of 27977983 is about 5289.4218020498. The cubic root of 27977983 is about 303.5792851511.

The spelling of 27977983 in words is "twenty-seven million, nine hundred seventy-seven thousand, nine hundred eighty-three".