99705216 has 64 divisors (see below), whose sum is σ = 285228720. Its totient is φ = 30676992.

The previous prime is 99705209. The next prime is 99705223. The reversal of 99705216 is 61250799.

It is an interprime number because it is at equal distance from previous prime (99705209) and next prime (99705223).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×99705216² = 19882260195213312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4995 + ... + 14978.

Almost surely, 2^99705216 is an apocalyptic number.

99705216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

99705216 is an abundant number, since it is smaller than the sum of its proper divisors (185523504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99705216 is a wasteful number, since it uses less digits than its factorization.

99705216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20003 (or 19991 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 99705216 is about 9985.2499217596. The cubic root of 99705216 is about 463.7023457595.

The spelling of 99705216 in words is "ninety-nine million, seven hundred five thousand, two hundred sixteen".