99680005 has 8 divisors (see below), whose sum is σ = 120308472. Its totient is φ = 79282368.

The previous prime is 99679991. The next prime is 99680011. The reversal of 99680005 is 50008699.

It can be written as a sum of positive squares in 4 ways, for example, as 28547649 + 71132356 = 5343^2 + 8434^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99680005 - 2¹¹ = 99677957 is a prime.

It is a super-2 number, since 2×99680005² = 19872206793600050, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56754 + ... + 58483.

It is an arithmetic number, because the mean of its divisors is an integer number (15038559).

Almost surely, 2^99680005 is an apocalyptic number.

It is an amenable number.

99680005 is a deficient number, since it is larger than the sum of its proper divisors (20628467).

99680005 is a wasteful number, since it uses less digits than its factorization.

99680005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115415.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 99680005 is about 9983.9874298799. The cubic root of 99680005 is about 463.6632592544.

The spelling of 99680005 in words is "ninety-nine million, six hundred eighty thousand, five".