18979127 has 2 divisors, whose sum is σ = 18979128. Its totient is φ = 18979126.

The previous prime is 18979111. The next prime is 18979133. The reversal of 18979127 is 72197981.

It is a strong prime.

It is an emirp because it is prime and its reverse (72197981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18979127 - 2⁴ = 18979111 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18979027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9489563 + 9489564.

It is an arithmetic number, because the mean of its divisors is an integer number (9489564).

Almost surely, 2^18979127 is an apocalyptic number.

18979127 is a deficient number, since it is larger than the sum of its proper divisors (1).

18979127 is an equidigital number, since it uses as much as digits as its factorization.

18979127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 44.

The square root of 18979127 is about 4356.5039882915. The cubic root of 18979127 is about 266.7424140720.

The spelling of 18979127 in words is "eighteen million, nine hundred seventy-nine thousand, one hundred twenty-seven".