420676979 has 2 divisors, whose sum is σ = 420676980. Its totient is φ = 420676978.

The previous prime is 420676961. The next prime is 420676981. The reversal of 420676979 is 979676024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420676979 - 2⁸ = 420676723 is a prime.

Together with 420676981, 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 (420676909) 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 as a sum of consecutive naturals, namely, 210338489 + 210338490.

It is an arithmetic number, because the mean of its divisors is an integer number (210338490).

Almost surely, 2^420676979 is an apocalyptic number.

420676979 is a deficient number, since it is larger than the sum of its proper divisors (1).

420676979 is an equidigital number, since it uses as much as digits as its factorization.

420676979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 420676979 is about 20510.4114780762. The cubic root of 420676979 is about 749.2893885508.

The spelling of 420676979 in words is "four hundred twenty million, six hundred seventy-six thousand, nine hundred seventy-nine".