9961379499 has 8 divisors (see below), whose sum is σ = 13291914240. Its totient is φ = 6635882216.

The previous prime is 9961379497. The next prime is 9961379503. The reversal of 9961379499 is 9949731699.

9961379499 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9961379499 - 2¹ = 9961379497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9961379497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1254747 + ... + 1262660.

It is an arithmetic number, because the mean of its divisors is an integer number (1661489280).

Almost surely, 2^9961379499 is an apocalyptic number.

9961379499 is a deficient number, since it is larger than the sum of its proper divisors (3330534741).

9961379499 is a wasteful number, since it uses less digits than its factorization.

9961379499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518729.

The product of its digits is 29760696, while the sum is 66.

The square root of 9961379499 is about 99806.7106912155. The cubic root of 9961379499 is about 2151.6576003011.

The spelling of 9961379499 in words is "nine billion, nine hundred sixty-one million, three hundred seventy-nine thousand, four hundred ninety-nine".