99777993 has 8 divisors (see below), whose sum is σ = 152042688. Its totient is φ = 57015984.

The previous prime is 99777971. The next prime is 99778013. The reversal of 99777993 is 39977799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99777993 - 2⁶ = 99777929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99777943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2375646 + ... + 2375687.

It is an arithmetic number, because the mean of its divisors is an integer number (19005336).

Almost surely, 2^99777993 is an apocalyptic number.

It is an amenable number.

99777993 is a deficient number, since it is larger than the sum of its proper divisors (52264695).

99777993 is a wasteful number, since it uses less digits than its factorization.

99777993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751343.

The product of its digits is 6751269, while the sum is 60.

The square root of 99777993 is about 9988.8934822632. The cubic root of 99777993 is about 463.8151404538.

The spelling of 99777993 in words is "ninety-nine million, seven hundred seventy-seven thousand, nine hundred ninety-three".