705216649 has 8 divisors (see below), whose sum is σ = 714165248. Its totient is φ = 696321360.

The previous prime is 705216637. The next prime is 705216653. The reversal of 705216649 is 946612507.

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 705216649 - 2⁹ = 705216137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (705216619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13639 + ... + 39955.

It is an arithmetic number, because the mean of its divisors is an integer number (89270656).

Almost surely, 2^705216649 is an apocalyptic number.

It is an amenable number.

705216649 is a deficient number, since it is larger than the sum of its proper divisors (8948599).

705216649 is a wasteful number, since it uses less digits than its factorization.

705216649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26655.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 705216649 is about 26555.9155180159. The cubic root of 705216649 is about 890.1042040175.

The spelling of 705216649 in words is "seven hundred five million, two hundred sixteen thousand, six hundred forty-nine".