720021113 has 8 divisors (see below), whose sum is σ = 826476480. Its totient is φ = 614464560.

The previous prime is 720021101. The next prime is 720021121. The reversal of 720021113 is 311120027.

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

It is a cyclic number.

It is not a de Polignac number, because 720021113 - 2¹⁰ = 720020089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720021091 and 720021100.

It is not an unprimeable number, because it can be changed into a prime (720020113) 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, 222983 + ... + 226188.

It is an arithmetic number, because the mean of its divisors is an integer number (103309560).

Almost surely, 2^720021113 is an apocalyptic number.

It is an amenable number.

720021113 is a deficient number, since it is larger than the sum of its proper divisors (106455367).

720021113 is a wasteful number, since it uses less digits than its factorization.

720021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449407.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 720021113 is about 26833.2091446402. The cubic root of 720021113 is about 896.2897099571.

The spelling of 720021113 in words is "seven hundred twenty million, twenty-one thousand, one hundred thirteen".