720345693 has 8 divisors (see below), whose sum is σ = 960585856. Its totient is φ = 480168000.

The previous prime is 720345679. The next prime is 720345697. The reversal of 720345693 is 396543027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 720345693 - 2²⁸ = 451910237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720345697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32268 + ... + 49818.

It is an arithmetic number, because the mean of its divisors is an integer number (120073232).

Almost surely, 2^720345693 is an apocalyptic number.

It is an amenable number.

720345693 is a deficient number, since it is larger than the sum of its proper divisors (240240163).

720345693 is a wasteful number, since it uses less digits than its factorization.

720345693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31235.

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 720345693 is about 26839.2565657099. The cubic root of 720345693 is about 896.4243699022.

The spelling of 720345693 in words is "seven hundred twenty million, three hundred forty-five thousand, six hundred ninety-three".