705533991 has 16 divisors (see below), whose sum is σ = 986984448. Its totient is φ = 447717600.

The previous prime is 705533987. The next prime is 705534013. The reversal of 705533991 is 199335507.

It is a happy number.

It is not a de Polignac number, because 705533991 - 2² = 705533987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705533791) 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 15 ways as a sum of consecutive naturals, for example, 56511 + ... + 67856.

It is an arithmetic number, because the mean of its divisors is an integer number (61686528).

Almost surely, 2^705533991 is an apocalyptic number.

705533991 is a deficient number, since it is larger than the sum of its proper divisors (281450457).

705533991 is a wasteful number, since it uses less digits than its factorization.

705533991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124462.

The product of its (nonzero) digits is 127575, while the sum is 42.

The square root of 705533991 is about 26561.8898235799. The cubic root of 705533991 is about 890.2376973158.

The spelling of 705533991 in words is "seven hundred five million, five hundred thirty-three thousand, nine hundred ninety-one".