9999997057 has 4 divisors (see below), whose sum is σ = 10588232196. Its totient is φ = 9411761920.

The previous prime is 9999997043. The next prime is 9999997069. The reversal of 9999997057 is 7507999999.

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 2704104001 + 7295893056 = 52001^2 + 85416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999997057 is a prime.

It is a super-3 number, since 3×9999997057³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (9999997757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294117544 + ... + 294117577.

It is an arithmetic number, because the mean of its divisors is an integer number (2647058049).

Almost surely, 2^9999997057 is an apocalyptic number.

It is an amenable number.

9999997057 is a deficient number, since it is larger than the sum of its proper divisors (588235139).

9999997057 is a wasteful number, since it uses less digits than its factorization.

9999997057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588235138.

The product of its (nonzero) digits is 130203045, while the sum is 73.

The square root of 9999997057 is about 99999.9852849989. The cubic root of 9999997057 is about 2154.4344786818.

The spelling of 9999997057 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-seven thousand, fifty-seven".