9943099658 has 4 divisors (see below), whose sum is σ = 14914649490. Its totient is φ = 4971549828.

The previous prime is 9943099637. The next prime is 9943099679. The reversal of 9943099658 is 8569903499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8569903499 = 709 ⋅12087311.

It is an interprime number because it is at equal distance from previous prime (9943099637) and next prime (9943099679).

It can be written as a sum of positive squares in only one way, i.e., 9248091889 + 695007769 = 96167^2 + 26363^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9943099658.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2485774913 + ... + 2485774916.

Almost surely, 2^9943099658 is an apocalyptic number.

9943099658 is a deficient number, since it is larger than the sum of its proper divisors (4971549832).

9943099658 is a wasteful number, since it uses less digits than its factorization.

9943099658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4971549831.

The product of its (nonzero) digits is 18895680, while the sum is 62.

The square root of 9943099658 is about 99715.0924283782. The cubic root of 9943099658 is about 2150.3406460793.

The spelling of 9943099658 in words is "nine billion, nine hundred forty-three million, ninety-nine thousand, six hundred fifty-eight".