9720313864 has 8 divisors (see below), whose sum is σ = 18225588510. Its totient is φ = 4860156928.

The previous prime is 9720313861. The next prime is 9720313877. The reversal of 9720313864 is 4683130279.

It can be written as a sum of positive squares in only one way, i.e., 8271902500 + 1448411364 = 90950^2 + 38058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×9720313864² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9720313864.

It is not an unprimeable number, because it can be changed into a prime (9720313861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607519609 + ... + 607519624.

Almost surely, 2^9720313864 is an apocalyptic number.

It is an amenable number.

9720313864 is a deficient number, since it is larger than the sum of its proper divisors (8505274646).

9720313864 is a wasteful number, since it uses less digits than its factorization.

9720313864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215039239 (or 1215039235 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 9720313864 is about 98591.6521009766. The cubic root of 9720313864 is about 2134.1589532443.

The spelling of 9720313864 in words is "nine billion, seven hundred twenty million, three hundred thirteen thousand, eight hundred sixty-four".