18846979 has 2 divisors, whose sum is σ = 18846980. Its totient is φ = 18846978.

The previous prime is 18846967. The next prime is 18846983. The reversal of 18846979 is 97964881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18846979 - 2⁷ = 18846851 is a prime.

It is not a weakly prime, because it can be changed into another prime (18849979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9423489 + 9423490.

It is an arithmetic number, because the mean of its divisors is an integer number (9423490).

Almost surely, 2^18846979 is an apocalyptic number.

18846979 is a deficient number, since it is larger than the sum of its proper divisors (1).

18846979 is an equidigital number, since it uses as much as digits as its factorization.

18846979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 18846979 is about 4341.3107467676. The cubic root of 18846979 is about 266.1218796247.

The spelling of 18846979 in words is "eighteen million, eight hundred forty-six thousand, nine hundred seventy-nine".