720432393 has 4 divisors (see below), whose sum is σ = 960576528. Its totient is φ = 480288260.

The previous prime is 720432379. The next prime is 720432407. The reversal of 720432393 is 393234027.

720432393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (720432379) and next prime (720432407).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720432393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720432373) 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, 120072063 + ... + 120072068.

It is an arithmetic number, because the mean of its divisors is an integer number (240144132).

Almost surely, 2^720432393 is an apocalyptic number.

It is an amenable number.

720432393 is a deficient number, since it is larger than the sum of its proper divisors (240144135).

720432393 is a wasteful number, since it uses less digits than its factorization.

720432393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240144134.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 720432393 is about 26840.8716885276. The cubic root of 720432393 is about 896.4603326701.

The spelling of 720432393 in words is "seven hundred twenty million, four hundred thirty-two thousand, three hundred ninety-three".