9990038194 has 4 divisors (see below), whose sum is σ = 14985057294. Its totient is φ = 4995019096.

The previous prime is 9990038153. The next prime is 9990038213. The reversal of 9990038194 is 4918300999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4918300999 = 43 ⋅114379093.

It can be written as a sum of positive squares in only one way, i.e., 9650115225 + 339922969 = 98235^2 + 18437^2 .

It is a super-3 number, since 3×9990038194³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2497509547 + ... + 2497509550.

Almost surely, 2^9990038194 is an apocalyptic number.

9990038194 is a deficient number, since it is larger than the sum of its proper divisors (4995019100).

9990038194 is a wasteful number, since it uses less digits than its factorization.

9990038194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995019099.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 9990038194 is about 99950.1785591201. The cubic root of 9990038194 is about 2153.7190503297.

The spelling of 9990038194 in words is "nine billion, nine hundred ninety million, thirty-eight thousand, one hundred ninety-four".