720827979 has 4 divisors (see below), whose sum is σ = 961103976. Its totient is φ = 480551984.

The previous prime is 720827953. The next prime is 720827983. The reversal of 720827979 is 979728027.

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 720827979 - 2⁷ = 720827851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720827279) 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 3 ways as a sum of consecutive naturals, for example, 120137994 + ... + 120137999.

It is an arithmetic number, because the mean of its divisors is an integer number (240275994).

Almost surely, 2^720827979 is an apocalyptic number.

720827979 is a deficient number, since it is larger than the sum of its proper divisors (240275997).

720827979 is a wasteful number, since it uses less digits than its factorization.

720827979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240275996.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 720827979 is about 26848.2397747040. The cubic root of 720827979 is about 896.6243833487.

The spelling of 720827979 in words is "seven hundred twenty million, eight hundred twenty-seven thousand, nine hundred seventy-nine".