720353687 has 4 divisors (see below), whose sum is σ = 733945320. Its totient is φ = 706762056.

The previous prime is 720353671. The next prime is 720353731. The reversal of 720353687 is 786353027.

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 720353687 - 2⁴ = 720353671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720853687) 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, 6795737 + ... + 6795842.

It is an arithmetic number, because the mean of its divisors is an integer number (183486330).

Almost surely, 2^720353687 is an apocalyptic number.

720353687 is a deficient number, since it is larger than the sum of its proper divisors (13591633).

720353687 is a wasteful number, since it uses less digits than its factorization.

720353687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13591632.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 720353687 is about 26839.4054889448. The cubic root of 720353687 is about 896.4276858980.

The spelling of 720353687 in words is "seven hundred twenty million, three hundred fifty-three thousand, six hundred eighty-seven".