405499 has 2 divisors, whose sum is σ = 405500. Its totient is φ = 405498.

The previous prime is 405497. The next prime is 405521. The reversal of 405499 is 994504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405499 - 2¹ = 405497 is a prime.

Together with 405497, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 405499.

It is not a weakly prime, because it can be changed into another prime (405491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202749 + 202750.

It is an arithmetic number, because the mean of its divisors is an integer number (202750).

2⁴⁰⁵⁴⁹⁹ is an apocalyptic number.

405499 is a deficient number, since it is larger than the sum of its proper divisors (1).

405499 is an equidigital number, since it uses as much as digits as its factorization.

405499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 405499 is about 636.7880338072. The cubic root of 405499 is about 74.0167359274.

The spelling of 405499 in words is "four hundred five thousand, four hundred ninety-nine".