9931064513 has 4 divisors (see below), whose sum is σ = 10199471700. Its totient is φ = 9662657328.

The previous prime is 9931064497. The next prime is 9931064531. The reversal of 9931064513 is 3154601399.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7601747344 + 2329317169 = 87188^2 + 48263^2 .

It is a cyclic number.

It is not a de Polignac number, because 9931064513 - 2⁴ = 9931064497 is a prime.

It is a super-2 number, since 2×9931064513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9931064713) 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, 134203538 + ... + 134203611.

It is an arithmetic number, because the mean of its divisors is an integer number (2549867925).

Almost surely, 2^9931064513 is an apocalyptic number.

It is an amenable number.

9931064513 is a deficient number, since it is larger than the sum of its proper divisors (268407187).

9931064513 is a wasteful number, since it uses less digits than its factorization.

9931064513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268407186.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 9931064513 is about 99654.7264960373. The cubic root of 9931064513 is about 2149.4727037880.

The spelling of 9931064513 in words is "nine billion, nine hundred thirty-one million, sixty-four thousand, five hundred thirteen".