420595999 has 4 divisors (see below), whose sum is σ = 430854480. Its totient is φ = 410337520.

The previous prime is 420595993. The next prime is 420596021. The reversal of 420595999 is 999595024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420595999 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 (420595993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5129179 + ... + 5129260.

It is an arithmetic number, because the mean of its divisors is an integer number (107713620).

Almost surely, 2^420595999 is an apocalyptic number.

420595999 is a deficient number, since it is larger than the sum of its proper divisors (10258481).

420595999 is a wasteful number, since it uses less digits than its factorization.

420595999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10258480.

The product of its (nonzero) digits is 1312200, while the sum is 52.

The square root of 420595999 is about 20508.4372637215. The cubic root of 420595999 is about 749.2413062520.

The spelling of 420595999 in words is "four hundred twenty million, five hundred ninety-five thousand, nine hundred ninety-nine".