100420979 has 2 divisors, whose sum is σ = 100420980. Its totient is φ = 100420978.

The previous prime is 100420963. The next prime is 100420981. The reversal of 100420979 is 979024001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100420979 - 2⁴ = 100420963 is a prime.

Together with 100420981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100420949) 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 as a sum of consecutive naturals, namely, 50210489 + 50210490.

It is an arithmetic number, because the mean of its divisors is an integer number (50210490).

Almost surely, 2^100420979 is an apocalyptic number.

100420979 is a deficient number, since it is larger than the sum of its proper divisors (1).

100420979 is an equidigital number, since it uses as much as digits as its factorization.

100420979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 100420979 is about 10021.0268435924. The cubic root of 100420979 is about 464.8093086373.

The spelling of 100420979 in words is "one hundred million, four hundred twenty thousand, nine hundred seventy-nine".