720446423 has 4 divisors (see below), whose sum is σ = 721005768. Its totient is φ = 719887080.

The previous prime is 720446407. The next prime is 720446429. The reversal of 720446423 is 324644027.

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 720446423 - 2⁴ = 720446407 is a prime.

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 720446423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720446429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277736 + ... + 280317.

It is an arithmetic number, because the mean of its divisors is an integer number (180251442).

Almost surely, 2^720446423 is an apocalyptic number.

720446423 is a deficient number, since it is larger than the sum of its proper divisors (559345).

720446423 is a wasteful number, since it uses less digits than its factorization.

720446423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559344.

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 720446423 is about 26841.1330424034. The cubic root of 720446423 is about 896.4661519794.

The spelling of 720446423 in words is "seven hundred twenty million, four hundred forty-six thousand, four hundred twenty-three".