420354679 has 2 divisors, whose sum is σ = 420354680. Its totient is φ = 420354678.

The previous prime is 420354677. The next prime is 420354691. The reversal of 420354679 is 976453024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420354679 - 2¹ = 420354677 is a prime.

Together with 420354677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420354677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210177339 + 210177340.

It is an arithmetic number, because the mean of its divisors is an integer number (210177340).

Almost surely, 2^420354679 is an apocalyptic number.

420354679 is a deficient number, since it is larger than the sum of its proper divisors (1).

420354679 is an equidigital number, since it uses as much as digits as its factorization.

420354679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 420354679 is about 20502.5529873721. The cubic root of 420354679 is about 749.0979846296.

The spelling of 420354679 in words is "four hundred twenty million, three hundred fifty-four thousand, six hundred seventy-nine".