9297899521 has 4 divisors (see below), whose sum is σ = 9303888132. Its totient is φ = 9291910912.

The previous prime is 9297899491. The next prime is 9297899531. The reversal of 9297899521 is 1259987929.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1259987929 = 17 ⋅74116937.

It can be written as a sum of positive squares in 2 ways, for example, as 4046868225 + 5251031296 = 63615^2 + 72464^2 .

It is a cyclic number.

It is not a de Polignac number, because 9297899521 - 2¹¹ = 9297897473 is a prime.

It is a super-2 number, since 2×9297899521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9297899521.

It is not an unprimeable number, because it can be changed into a prime (9297899531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2991976 + ... + 2995081.

It is an arithmetic number, because the mean of its divisors is an integer number (2325972033).

Almost surely, 2^9297899521 is an apocalyptic number.

It is an amenable number.

9297899521 is a deficient number, since it is larger than the sum of its proper divisors (5988611).

9297899521 is a wasteful number, since it uses less digits than its factorization.

9297899521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5988610.

The product of its digits is 7348320, while the sum is 61.

The square root of 9297899521 is about 96425.6165186409. The cubic root of 9297899521 is about 2102.7853833499.

The spelling of 9297899521 in words is "nine billion, two hundred ninety-seven million, eight hundred ninety-nine thousand, five hundred twenty-one".