9938771491 has 8 divisors (see below), whose sum is σ = 11004122304. Its totient is φ = 8900391720.

The previous prime is 9938771473. The next prime is 9938771497. The reversal of 9938771491 is 1941778399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9938771491 - 2⁵ = 9938771459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9938771497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6741985 + ... + 6743458.

It is an arithmetic number, because the mean of its divisors is an integer number (1375515288).

Almost surely, 2^9938771491 is an apocalyptic number.

9938771491 is a deficient number, since it is larger than the sum of its proper divisors (1065350813).

9938771491 is a wasteful number, since it uses less digits than its factorization.

9938771491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13485521.

The product of its digits is 3429216, while the sum is 58.

The square root of 9938771491 is about 99693.3873985632. The cubic root of 9938771491 is about 2150.0285910025.

The spelling of 9938771491 in words is "nine billion, nine hundred thirty-eight million, seven hundred seventy-one thousand, four hundred ninety-one".