407999 has 4 divisors (see below), whose sum is σ = 419064. Its totient is φ = 396936.

The previous prime is 407993. The next prime is 408011. The reversal of 407999 is 999704.

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

It is a de Polignac number, because none of the positive numbers 2^k-407999 is a prime.

It is a Duffinian number.

407999 is a modest number, since divided by 999 gives 407 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5477 + ... + 5550.

It is an arithmetic number, because the mean of its divisors is an integer number (104766).

2⁴⁰⁷⁹⁹⁹ is an apocalyptic number.

407999 is a deficient number, since it is larger than the sum of its proper divisors (11065).

407999 is a wasteful number, since it uses less digits than its factorization.

407999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 407999 is about 638.7479941260. The cubic root of 407999 is about 74.1685347900.

The spelling of 407999 in words is "four hundred seven thousand, nine hundred ninety-nine".