99991941829 has 8 divisors (see below), whose sum is σ = 107851631832. Its totient is φ = 92156252160.

The previous prime is 99991941733. The next prime is 99991941851. The reversal of 99991941829 is 92814919999.

It can be written as a sum of positive squares in 4 ways, for example, as 17929745604 + 82062196225 = 133902^2 + 286465^2 .

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 99991941829 - 2⁷ = 99991941701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99991941899) 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, 5991424 + ... + 6008089.

It is an arithmetic number, because the mean of its divisors is an integer number (13481453979).

Almost surely, 2^99991941829 is an apocalyptic number.

It is an amenable number.

99991941829 is a deficient number, since it is larger than the sum of its proper divisors (7859690003).

99991941829 is a wasteful number, since it uses less digits than its factorization.

99991941829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000167.

The product of its digits is 34012224, while the sum is 70.

The spelling of 99991941829 in words is "ninety-nine billion, nine hundred ninety-one million, nine hundred forty-one thousand, eight hundred twenty-nine".