420002987 has 2 divisors, whose sum is σ = 420002988. Its totient is φ = 420002986.

The previous prime is 420002983. The next prime is 420003011. The reversal of 420002987 is 789200024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420002987 - 2² = 420002983 is a prime.

It is equal to p_22344638 and since 420002987 and 22344638 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (420002981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210001493 + 210001494.

It is an arithmetic number, because the mean of its divisors is an integer number (210001494).

Almost surely, 2^420002987 is an apocalyptic number.

420002987 is a deficient number, since it is larger than the sum of its proper divisors (1).

420002987 is an equidigital number, since it uses as much as digits as its factorization.

420002987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 420002987 is about 20493.9744071276. The cubic root of 420002987 is about 748.8890140559.

The spelling of 420002987 in words is "four hundred twenty million, two thousand, nine hundred eighty-seven".