9720157 has 8 divisors (see below), whose sum is σ = 9999360. Its totient is φ = 9443040.

The previous prime is 9720149. The next prime is 9720163. The reversal of 9720157 is 7510279.

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 9720157 - 2³ = 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 (9720197) 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 7 ways as a sum of consecutive naturals, for example, 15394 + ... + 16012.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^9720157 is an apocalyptic number.

It is an amenable number.

9720157 is a deficient number, since it is larger than the sum of its proper divisors (279203).

9720157 is a wasteful number, since it uses less digits than its factorization.

9720157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 9720157 is about 3117.7166324090. The cubic root of 9720157 is about 213.4147473008.

The spelling of 9720157 in words is "nine million, seven hundred twenty thousand, one hundred fifty-seven".