720737213 has 16 divisors (see below), whose sum is σ = 830269440. Its totient is φ = 612870000.

The previous prime is 720737209. The next prime is 720737221. The reversal of 720737213 is 312737027.

It is a cyclic number.

It is not a de Polignac number, because 720737213 - 2² = 720737209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720737213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720737713) 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 15 ways as a sum of consecutive naturals, for example, 545768 + ... + 547086.

It is an arithmetic number, because the mean of its divisors is an integer number (51891840).

Almost surely, 2^720737213 is an apocalyptic number.

It is an amenable number.

720737213 is a deficient number, since it is larger than the sum of its proper divisors (109532227).

720737213 is a wasteful number, since it uses less digits than its factorization.

720737213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888.

The product of its (nonzero) digits is 12348, while the sum is 32.

The square root of 720737213 is about 26846.5493685874. The cubic root of 720737213 is about 896.5867477282.

The spelling of 720737213 in words is "seven hundred twenty million, seven hundred thirty-seven thousand, two hundred thirteen".