406999 has 8 divisors (see below), whose sum is σ = 442880. Its totient is φ = 372600.

The previous prime is 406993. The next prime is 407023. The reversal of 406999 is 999604.

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

It is a cyclic number.

It is not a de Polignac number, because 406999 - 2¹¹ = 404951 is a prime.

It is a Duffinian number.

406999 is a modest number, since divided by 999 gives 406 as remainder.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406993) 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, 244 + ... + 934.

It is an arithmetic number, because the mean of its divisors is an integer number (55360).

2⁴⁰⁶⁹⁹⁹ is an apocalyptic number.

406999 is a deficient number, since it is larger than the sum of its proper divisors (35881).

406999 is a wasteful number, since it uses less digits than its factorization.

406999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 406999 is about 637.9647325676. The cubic root of 406999 is about 74.1078898597.

The spelling of 406999 in words is "four hundred six thousand, nine hundred ninety-nine".