99474643421 has 4 divisors (see below), whose sum is σ = 105326093052. Its totient is φ = 93623193792.

The previous prime is 99474643417. The next prime is 99474643439. The reversal of 99474643421 is 12434647499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76099291321 + 23375352100 = 275861^2 + 152890^2 .

It is a cyclic number.

It is not a de Polignac number, because 99474643421 - 2² = 99474643417 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 (99474643321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2925724790 + ... + 2925724823.

It is an arithmetic number, because the mean of its divisors is an integer number (26331523263).

Almost surely, 2^99474643421 is an apocalyptic number.

It is an amenable number.

99474643421 is a deficient number, since it is larger than the sum of its proper divisors (5851449631).

99474643421 is a wasteful number, since it uses less digits than its factorization.

99474643421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851449630.

The product of its digits is 5225472, while the sum is 53.

The spelling of 99474643421 in words is "ninety-nine billion, four hundred seventy-four million, six hundred forty-three thousand, four hundred twenty-one".