9720361331 has 2 divisors, whose sum is σ = 9720361332. Its totient is φ = 9720361330.

The previous prime is 9720361319. The next prime is 9720361349. The reversal of 9720361331 is 1331630279.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9720361331 is a prime.

It is a super-2 number, since 2×9720361331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9720361291 and 9720361300.

It is not a weakly prime, because it can be changed into another prime (9720361351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860180665 + 4860180666.

It is an arithmetic number, because the mean of its divisors is an integer number (4860180666).

Almost surely, 2^9720361331 is an apocalyptic number.

9720361331 is a deficient number, since it is larger than the sum of its proper divisors (1).

9720361331 is an equidigital number, since it uses as much as digits as its factorization.

9720361331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 9720361331 is about 98591.8928259317. The cubic root of 9720361331 is about 2134.1624271362.

The spelling of 9720361331 in words is "nine billion, seven hundred twenty million, three hundred sixty-one thousand, three hundred thirty-one".