720701705 has 4 divisors (see below), whose sum is σ = 864842052. Its totient is φ = 576561360.

The previous prime is 720701687. The next prime is 720701747. The reversal of 720701705 is 507107027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 388405264 + 332296441 = 19708^2 + 18229^2 .

It is not a de Polignac number, because 720701705 - 2¹⁸ = 720439561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 72070166 + ... + 72070175.

It is an arithmetic number, because the mean of its divisors is an integer number (216210513).

Almost surely, 2^720701705 is an apocalyptic number.

It is an amenable number.

720701705 is a deficient number, since it is larger than the sum of its proper divisors (144140347).

720701705 is a wasteful number, since it uses less digits than its factorization.

720701705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144140346.

The product of its (nonzero) digits is 3430, while the sum is 29.

The square root of 720701705 is about 26845.8880464029. Note that the first 3 decimals coincide. The cubic root of 720701705 is about 896.5720236723.

The spelling of 720701705 in words is "seven hundred twenty million, seven hundred one thousand, seven hundred five".