9897949736 has 16 divisors (see below), whose sum is σ = 18681563040. Its totient is φ = 4916199600.

The previous prime is 9897949727. The next prime is 9897949739. The reversal of 9897949736 is 6379497989.

It is a self number, because there is not a number n which added to its sum of digits gives 9897949736.

It is not an unprimeable number, because it can be changed into a prime (9897949739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4095626 + ... + 4098041.

It is an arithmetic number, because the mean of its divisors is an integer number (1167597690).

Almost surely, 2^9897949736 is an apocalyptic number.

It is an amenable number.

9897949736 is a deficient number, since it is larger than the sum of its proper divisors (8783613304).

9897949736 is a wasteful number, since it uses less digits than its factorization.

9897949736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193824 (or 8193820 counting only the distinct ones).

The product of its digits is 185177664, while the sum is 71.

The square root of 9897949736 is about 99488.4402129212. The cubic root of 9897949736 is about 2147.0809302779.

The spelling of 9897949736 in words is "nine billion, eight hundred ninety-seven million, nine hundred forty-nine thousand, seven hundred thirty-six".