99436894709 has 4 divisors (see below), whose sum is σ = 99437879616. Its totient is φ = 99435909804.

The previous prime is 99436894693. The next prime is 99436894721. The reversal of 99436894709 is 90749863499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90749863499 = 1327 ⋅68387237.

It is a cyclic number.

It is not a de Polignac number, because 99436894709 - 2⁴ = 99436894693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99436834709) 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, 321149 + ... + 549554.

It is an arithmetic number, because the mean of its divisors is an integer number (24859469904).

Almost surely, 2^99436894709 is an apocalyptic number.

It is an amenable number.

99436894709 is a deficient number, since it is larger than the sum of its proper divisors (984907).

99436894709 is a wasteful number, since it uses less digits than its factorization.

99436894709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984906.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 99436894709 in words is "ninety-nine billion, four hundred thirty-six million, eight hundred ninety-four thousand, seven hundred nine".