9897151730 has 8 divisors (see below), whose sum is σ = 17814873132. Its totient is φ = 3958860688.

The previous prime is 9897151727. The next prime is 9897151751. The reversal of 9897151730 is 371517989.

It can be written as a sum of positive squares in 2 ways, for example, as 9670558921 + 226592809 = 98339^2 + 15053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9897151730² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494857577 + ... + 494857596.

Almost surely, 2^9897151730 is an apocalyptic number.

9897151730 is a deficient number, since it is larger than the sum of its proper divisors (7917721402).

9897151730 is a wasteful number, since it uses less digits than its factorization.

9897151730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989715180.

The product of its (nonzero) digits is 476280, while the sum is 50.

The square root of 9897151730 is about 99484.4295857397. The cubic root of 9897151730 is about 2147.0232270984.

The spelling of 9897151730 in words is "nine billion, eight hundred ninety-seven million, one hundred fifty-one thousand, seven hundred thirty".