9720631 has 2 divisors, whose sum is σ = 9720632. Its totient is φ = 9720630.

The previous prime is 9720619. The next prime is 9720653. The reversal of 9720631 is 1360279.

9720631 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1360279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9720631 - 2⁹ = 9720119 is a prime.

It is a super-2 number, since 2×9720631² = 188981334076322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9720631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9720671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860315 + 4860316.

It is an arithmetic number, because the mean of its divisors is an integer number (4860316).

Almost surely, 2^9720631 is an apocalyptic number.

9720631 is a deficient number, since it is larger than the sum of its proper divisors (1).

9720631 is an equidigital number, since it uses as much as digits as its factorization.

9720631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 9720631 is about 3117.7926486539. The cubic root of 9720631 is about 213.4182162758.

The spelling of 9720631 in words is "nine million, seven hundred twenty thousand, six hundred thirty-one".