9999077491 has 12 divisors (see below), whose sum is σ = 10839353520. Its totient is φ = 9219731040.

The previous prime is 9999077489. The next prime is 9999077509. The reversal of 9999077491 is 1947709999.

It is not a de Polignac number, because 9999077491 - 2¹ = 9999077489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999047491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123121 + ... + 187501.

It is an arithmetic number, because the mean of its divisors is an integer number (903279460).

Almost surely, 2^9999077491 is an apocalyptic number.

9999077491 is a deficient number, since it is larger than the sum of its proper divisors (840276029).

9999077491 is a wasteful number, since it uses less digits than its factorization.

9999077491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65326 (or 65313 counting only the distinct ones).

The product of its (nonzero) digits is 11573604, while the sum is 64.

The square root of 9999077491 is about 99995.3873486172. The cubic root of 9999077491 is about 2154.3684384815.

The spelling of 9999077491 in words is "nine billion, nine hundred ninety-nine million, seventy-seven thousand, four hundred ninety-one".