720695 has 4 divisors (see below), whose sum is σ = 864840. Its totient is φ = 576552.

The previous prime is 720683. The next prime is 720697. The reversal of 720695 is 596027.

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

It is a cyclic number.

It is not a de Polignac number, because 720695 - 2⁸ = 720439 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720695.

It is not an unprimeable number, because it can be changed into a prime (720697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72065 + ... + 72074.

It is an arithmetic number, because the mean of its divisors is an integer number (216210).

2⁷²⁰⁶⁹⁵ is an apocalyptic number.

720695 is a deficient number, since it is larger than the sum of its proper divisors (144145).

720695 is a wasteful number, since it uses less digits than its factorization.

720695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144144.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 720695 is about 848.9375713208. The cubic root of 720695 is about 89.6569243264.

It can be divided in two parts, 7 and 20695, that added together give a palindrome (20702).

The spelling of 720695 in words is "seven hundred twenty thousand, six hundred ninety-five".