99876521429 has 8 divisors (see below), whose sum is σ = 100534049880. Its totient is φ = 99221078016.

The previous prime is 99876521413. The next prime is 99876521431. The reversal of 99876521429 is 92412567899.

It can be written as a sum of positive squares in 4 ways, for example, as 73535880625 + 26340640804 = 271175^2 + 162298^2 .

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 99876521429 - 2⁴ = 99876521413 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 (99876521489) 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, 425084 + ... + 616805.

It is an arithmetic number, because the mean of its divisors is an integer number (12566756235).

Almost surely, 2^99876521429 is an apocalyptic number.

It is an amenable number.

99876521429 is a deficient number, since it is larger than the sum of its proper divisors (657528451).

99876521429 is a wasteful number, since it uses less digits than its factorization.

99876521429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042519.

The product of its digits is 19595520, while the sum is 62.

The spelling of 99876521429 in words is "ninety-nine billion, eight hundred seventy-six million, five hundred twenty-one thousand, four hundred twenty-nine".