720955979 has 16 divisors (see below), whose sum is σ = 771340320. Its totient is φ = 672672000.

The previous prime is 720955951. The next prime is 720955997. The reversal of 720955979 is 979559027.

It is a cyclic number.

It is not a de Polignac number, because 720955979 - 2¹² = 720951883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

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 720955979.

It is not an unprimeable number, because it can be changed into a prime (720955909) 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 15 ways as a sum of consecutive naturals, for example, 99479 + ... + 106479.

It is an arithmetic number, because the mean of its divisors is an integer number (48208770).

Almost surely, 2^720955979 is an apocalyptic number.

720955979 is a deficient number, since it is larger than the sum of its proper divisors (50384341).

720955979 is a wasteful number, since it uses less digits than its factorization.

720955979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7150.

The product of its (nonzero) digits is 1786050, while the sum is 53.

The square root of 720955979 is about 26850.6234378273. The cubic root of 720955979 is about 896.6774524729.

The spelling of 720955979 in words is "seven hundred twenty million, nine hundred fifty-five thousand, nine hundred seventy-nine".