705509907 has 12 divisors (see below), whose sum is σ = 944832600. Its totient is φ = 468272640.

The previous prime is 705509897. The next prime is 705509923. The reversal of 705509907 is 709905507.

It is a happy number.

It is not a de Polignac number, because 705509907 - 2¹⁰ = 705508883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (705509507) 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 11 ways as a sum of consecutive naturals, for example, 172219 + ... + 176267.

It is an arithmetic number, because the mean of its divisors is an integer number (78736050).

Almost surely, 2^705509907 is an apocalyptic number.

705509907 is a deficient number, since it is larger than the sum of its proper divisors (239322693).

705509907 is an equidigital number, since it uses as much as digits as its factorization.

705509907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 99225, while the sum is 42.

The square root of 705509907 is about 26561.4364634144. The cubic root of 705509907 is about 890.2275675281.

The spelling of 705509907 in words is "seven hundred five million, five hundred nine thousand, nine hundred seven".