720616927 has 4 divisors (see below), whose sum is σ = 763006176. Its totient is φ = 678227680.

The previous prime is 720616909. The next prime is 720616931. The reversal of 720616927 is 729616027.

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 720616927 - 2¹¹ = 720614879 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 720616927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720616957) 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, 21194599 + ... + 21194632.

It is an arithmetic number, because the mean of its divisors is an integer number (190751544).

Almost surely, 2^720616927 is an apocalyptic number.

720616927 is a deficient number, since it is larger than the sum of its proper divisors (42389249).

720616927 is a wasteful number, since it uses less digits than its factorization.

720616927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42389248.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 720616927 is about 26844.3090244469. The cubic root of 720616927 is about 896.5368669340.

The spelling of 720616927 in words is "seven hundred twenty million, six hundred sixteen thousand, nine hundred twenty-seven".