706721885 has 8 divisors (see below), whose sum is σ = 850470840. Its totient is φ = 563774464.

The previous prime is 706721863. The next prime is 706721903. The reversal of 706721885 is 588127607.

It can be written as a sum of positive squares in 4 ways, for example, as 45306361 + 661415524 = 6731^2 + 25718^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 706721885 - 2⁸ = 706721629 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 198440 + ... + 201969.

It is an arithmetic number, because the mean of its divisors is an integer number (106308855).

Almost surely, 2^706721885 is an apocalyptic number.

It is an amenable number.

706721885 is a deficient number, since it is larger than the sum of its proper divisors (143748955).

706721885 is a wasteful number, since it uses less digits than its factorization.

706721885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400767.

The product of its (nonzero) digits is 188160, while the sum is 44.

The square root of 706721885 is about 26584.2412906594. The cubic root of 706721885 is about 890.7370425329.

The spelling of 706721885 in words is "seven hundred six million, seven hundred twenty-one thousand, eight hundred eighty-five".