99995779 has 6 divisors (see below), whose sum is σ = 108279636. Its totient is φ = 92303640.

The previous prime is 99995771. The next prime is 99995783. The reversal of 99995779 is 97759999.

It is not a de Polignac number, because 99995779 - 2³ = 99995771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99995779.

It is not an unprimeable number, because it can be changed into a prime (99995771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 295677 + ... + 296014.

It is an arithmetic number, because the mean of its divisors is an integer number (18046606).

Almost surely, 2^99995779 is an apocalyptic number.

99995779 is a deficient number, since it is larger than the sum of its proper divisors (8283857).

99995779 is a wasteful number, since it uses less digits than its factorization.

99995779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591717 (or 591704 counting only the distinct ones).

The product of its digits is 14467005, while the sum is 64.

The square root of 99995779 is about 9999.7889477728. The cubic root of 99995779 is about 464.1523525539.

The spelling of 99995779 in words is "ninety-nine million, nine hundred ninety-five thousand, seven hundred seventy-nine".