720002001 has 16 divisors (see below), whose sum is σ = 992010240. Its totient is φ = 464030160.

The previous prime is 720001999. The next prime is 720002011. The reversal of 720002001 is 100200027.

It is not a de Polignac number, because 720002001 - 2¹ = 720001999 is a prime.

It is a super-3 number, since 3×720002001³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (720002011) 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, 99070 + ... + 106088.

It is an arithmetic number, because the mean of its divisors is an integer number (62000640).

Almost surely, 2^720002001 is an apocalyptic number.

It is an amenable number.

720002001 is a deficient number, since it is larger than the sum of its proper divisors (272008239).

720002001 is a wasteful number, since it uses less digits than its factorization.

720002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8156.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 720002001 is about 26832.8530164051. The cubic root of 720002001 is about 896.2817796154.

Adding to 720002001 its reverse (100200027), we get a palindrome (820202028).

The spelling of 720002001 in words is "seven hundred twenty million, two thousand, one".