720435979 has 8 divisors (see below), whose sum is σ = 765304848. Its totient is φ = 675843840.

The previous prime is 720435971. The next prime is 720435983. The reversal of 720435979 is 979534027.

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

It is not a de Polignac number, because 720435979 - 2³ = 720435971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720435971) 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 7 ways as a sum of consecutive naturals, for example, 63802 + ... + 74239.

It is an arithmetic number, because the mean of its divisors is an integer number (95663106).

Almost surely, 2^720435979 is an apocalyptic number.

720435979 is a deficient number, since it is larger than the sum of its proper divisors (44868869).

720435979 is a wasteful number, since it uses less digits than its factorization.

720435979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138365.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 720435979 is about 26840.9384895536. The cubic root of 720435979 is about 896.4618200646.

The spelling of 720435979 in words is "seven hundred twenty million, four hundred thirty-five thousand, nine hundred seventy-nine".