9219798638 has 4 divisors (see below), whose sum is σ = 13829697960. Its totient is φ = 4609899318.

The previous prime is 9219798611. The next prime is 9219798647. The reversal of 9219798638 is 8368979129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8368979129 = 7 ⋅1195568447.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304949658 + ... + 2304949661.

It is an arithmetic number, because the mean of its divisors is an integer number (3457424490).

Almost surely, 2^9219798638 is an apocalyptic number.

9219798638 is a deficient number, since it is larger than the sum of its proper divisors (4609899322).

9219798638 is a wasteful number, since it uses less digits than its factorization.

9219798638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609899321.

The product of its digits is 11757312, while the sum is 62.

The square root of 9219798638 is about 96019.7825346423. The cubic root of 9219798638 is about 2096.8811327393.

The spelling of 9219798638 in words is "nine billion, two hundred nineteen million, seven hundred ninety-eight thousand, six hundred thirty-eight".