720732151 has 4 divisors (see below), whose sum is σ = 723006072. Its totient is φ = 718458232.

The previous prime is 720732121. The next prime is 720732161. The reversal of 720732151 is 151237027.

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 720732151 - 2⁹ = 720731639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720732121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136485 + ... + 1137118.

It is an arithmetic number, because the mean of its divisors is an integer number (180751518).

Almost surely, 2^720732151 is an apocalyptic number.

720732151 is a deficient number, since it is larger than the sum of its proper divisors (2273921).

720732151 is a wasteful number, since it uses less digits than its factorization.

720732151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273920.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 720732151 is about 26846.4550918739. The cubic root of 720732151 is about 896.5846487048.

Adding to 720732151 its reverse (151237027), we get a palindrome (871969178).

The spelling of 720732151 in words is "seven hundred twenty million, seven hundred thirty-two thousand, one hundred fifty-one".