705409999 has 4 divisors (see below), whose sum is σ = 806182864. Its totient is φ = 604637136.

The previous prime is 705409993. The next prime is 705410003. The reversal of 705409999 is 999904507.

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 705409999 - 2⁷ = 705409871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705409993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50386422 + ... + 50386435.

It is an arithmetic number, because the mean of its divisors is an integer number (201545716).

Almost surely, 2^705409999 is an apocalyptic number.

705409999 is a deficient number, since it is larger than the sum of its proper divisors (100772865).

705409999 is a wasteful number, since it uses less digits than its factorization.

705409999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100772864.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 705409999 is about 26559.5557003501. Note that the first 3 decimals coincide. The cubic root of 705409999 is about 890.1855435236.

The spelling of 705409999 in words is "seven hundred five million, four hundred nine thousand, nine hundred ninety-nine".