99789673 has 4 divisors (see below), whose sum is σ = 99965008. Its totient is φ = 99614340.

The previous prime is 99789631. The next prime is 99789689. The reversal of 99789673 is 37698799.

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 an emirpimes, since its reverse is a distinct semiprime: 37698799 = 71 ⋅530969.

It is a cyclic number.

It is not a de Polignac number, because 99789673 - 2¹³ = 99781481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99789773) 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, 86811 + ... + 87952.

It is an arithmetic number, because the mean of its divisors is an integer number (24991252).

It is a Poulet number, since it divides 2^99789672-1.

Almost surely, 2^99789673 is an apocalyptic number.

It is an amenable number.

99789673 is a deficient number, since it is larger than the sum of its proper divisors (175335).

99789673 is a wasteful number, since it uses less digits than its factorization.

99789673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175334.

The product of its digits is 5143824, while the sum is 58.

The square root of 99789673 is about 9989.4781144963. The cubic root of 99789673 is about 463.8332377961.

The spelling of 99789673 in words is "ninety-nine million, seven hundred eighty-nine thousand, six hundred seventy-three".