420420487 has 2 divisors, whose sum is σ = 420420488. Its totient is φ = 420420486.

The previous prime is 420420461. The next prime is 420420551. The reversal of 420420487 is 784024024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420420487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420420587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210210243 + 210210244.

It is an arithmetic number, because the mean of its divisors is an integer number (210210244).

Almost surely, 2^420420487 is an apocalyptic number.

420420487 is a deficient number, since it is larger than the sum of its proper divisors (1).

420420487 is an equidigital number, since it uses as much as digits as its factorization.

420420487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 31.

The square root of 420420487 is about 20504.1577978711. The cubic root of 420420487 is about 749.1370738959.

The spelling of 420420487 in words is "four hundred twenty million, four hundred twenty thousand, four hundred eighty-seven".