420047999 has 8 divisors (see below), whose sum is σ = 486816768. Its totient is φ = 354969720.

The previous prime is 420047989. The next prime is 420048001. The reversal of 420047999 is 999740024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420047999 - 2⁴ = 420047983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420047909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422087 + ... + 423080.

It is an arithmetic number, because the mean of its divisors is an integer number (60852096).

Almost surely, 2^420047999 is an apocalyptic number.

420047999 is a deficient number, since it is larger than the sum of its proper divisors (66768769).

420047999 is an equidigital number, since it uses as much as digits as its factorization.

420047999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845245.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 420047999 is about 20495.0725541531. The cubic root of 420047999 is about 748.9157660785.

The spelling of 420047999 in words is "four hundred twenty million, forty-seven thousand, nine hundred ninety-nine".