99511799 has 4 divisors (see below), whose sum is σ = 99660336. Its totient is φ = 99363264.

The previous prime is 99511787. The next prime is 99511807. The reversal of 99511799 is 99711599.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99511799 - 2⁸ = 99511543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99511729) 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, 73259 + ... + 74604.

It is an arithmetic number, because the mean of its divisors is an integer number (24915084).

Almost surely, 2^99511799 is an apocalyptic number.

99511799 is a deficient number, since it is larger than the sum of its proper divisors (148537).

99511799 is a wasteful number, since it uses less digits than its factorization.

99511799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148536.

The product of its digits is 229635, while the sum is 50.

The square root of 99511799 is about 9975.5600845266. The cubic root of 99511799 is about 463.4023080495.

The spelling of 99511799 in words is "ninety-nine million, five hundred eleven thousand, seven hundred ninety-nine".