402999 has 4 divisors (see below), whose sum is σ = 537336. Its totient is φ = 268664.

The previous prime is 402991. The next prime is 403001. The reversal of 402999 is 999204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 402999 - 2³ = 402991 is a prime.

It is a D-number.

402999 is a modest number, since divided by 999 gives 402 as remainder.

402999 is a lucky number.

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 (402991) 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, 67164 + ... + 67169.

It is an arithmetic number, because the mean of its divisors is an integer number (134334).

2⁴⁰²⁹⁹⁹ is an apocalyptic number.

402999 is a deficient number, since it is larger than the sum of its proper divisors (134337).

402999 is a wasteful number, since it uses less digits than its factorization.

402999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134336.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 402999 is about 634.8220223023. The cubic root of 402999 is about 73.8643118575.

The spelling of 402999 in words is "four hundred two thousand, nine hundred ninety-nine".