213405799 has 4 divisors (see below), whose sum is σ = 222684336. Its totient is φ = 204127264.

The previous prime is 213405763. The next prime is 213405839. The reversal of 213405799 is 997504312.

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 213405799 - 2²⁷ = 79188071 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213406799) 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, 4639234 + ... + 4639279.

It is an arithmetic number, because the mean of its divisors is an integer number (55671084).

Almost surely, 2^213405799 is an apocalyptic number.

213405799 is a deficient number, since it is larger than the sum of its proper divisors (9278537).

213405799 is an equidigital number, since it uses as much as digits as its factorization.

213405799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278536.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 213405799 is about 14608.4153486954. The cubic root of 213405799 is about 597.5882810449.

The spelling of 213405799 in words is "two hundred thirteen million, four hundred five thousand, seven hundred ninety-nine".