9993990697 has 4 divisors (see below), whose sum is σ = 10002230980. Its totient is φ = 9985750416.

The previous prime is 9993990631. The next prime is 9993990733. The reversal of 9993990697 is 7960993999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7960993999 = 7 ⋅1137284857.

It can be written as a sum of positive squares in 2 ways, for example, as 1055990016 + 8938000681 = 32496^2 + 94541^2 .

It is a cyclic number.

It is not a de Polignac number, because 9993990697 - 2¹¹ = 9993988649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9993990497) 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, 4118322 + ... + 4120747.

It is an arithmetic number, because the mean of its divisors is an integer number (2500557745).

Almost surely, 2^9993990697 is an apocalyptic number.

It is an amenable number.

9993990697 is a deficient number, since it is larger than the sum of its proper divisors (8240283).

9993990697 is a wasteful number, since it uses less digits than its factorization.

9993990697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8240282.

The product of its (nonzero) digits is 66961566, while the sum is 70.

The square root of 9993990697 is about 99969.9489696779. The cubic root of 9993990697 is about 2154.0030485300.

The spelling of 9993990697 in words is "nine billion, nine hundred ninety-three million, nine hundred ninety thousand, six hundred ninety-seven".