9720151 has 4 divisors (see below), whose sum is σ = 11108752. Its totient is φ = 8331552.

The previous prime is 9720149. The next prime is 9720163. The reversal of 9720151 is 1510279.

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 9720151 - 2¹ = 9720149 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 (9720121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694290 + ... + 694303.

It is an arithmetic number, because the mean of its divisors is an integer number (2777188).

Almost surely, 2^9720151 is an apocalyptic number.

9720151 is a deficient number, since it is larger than the sum of its proper divisors (1388601).

9720151 is a wasteful number, since it uses less digits than its factorization.

9720151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388600.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 9720151 is about 3117.7156701662. The cubic root of 9720151 is about 213.4147033890.

The spelling of 9720151 in words is "nine million, seven hundred twenty thousand, one hundred fifty-one".