99219453979 has 4 divisors (see below), whose sum is σ = 99718044400. Its totient is φ = 98720863560.

The previous prime is 99219453959. The next prime is 99219454039. The reversal of 99219453979 is 97935491299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97935491299 = 42433 ⋅2308003.

It is a cyclic number.

It is not a de Polignac number, because 99219453979 - 2⁵ = 99219453947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99219453959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249294912 + ... + 249295309.

It is an arithmetic number, because the mean of its divisors is an integer number (24929511100).

Almost surely, 2^99219453979 is an apocalyptic number.

99219453979 is a deficient number, since it is larger than the sum of its proper divisors (498590421).

99219453979 is a wasteful number, since it uses less digits than its factorization.

99219453979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498590420.

The product of its digits is 49601160, while the sum is 67.

The spelling of 99219453979 in words is "ninety-nine billion, two hundred nineteen million, four hundred fifty-three thousand, nine hundred seventy-nine".