99720196 has 9 divisors (see below), whose sum is σ = 174545301. Its totient is φ = 49850112.

The previous prime is 99720193. The next prime is 99720197. The reversal of 99720196 is 69102799.

The square root of 99720196 is 9986.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 65028096 = 5890^2 + 8064^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99720191) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17476 + ... + 22468.

Almost surely, 2^99720196 is an apocalyptic number.

99720196 is the 9986-th square number.

It is an amenable number.

99720196 is a deficient number, since it is larger than the sum of its proper divisors (74825105).

99720196 is an frugal number, since it uses more digits than its factorization.

99720196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990 (or 4995 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The cubic root of 99720196 is about 463.7255672570.

The spelling of 99720196 in words is "ninety-nine million, seven hundred twenty thousand, one hundred ninety-six".