99740169 has 9 divisors (see below), whose sum is σ = 144112423. Its totient is φ = 66473472.

The previous prime is 99740159. The next prime is 99740171. The reversal of 99740169 is 96104799.

The square root of 99740169 is 9987.

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., 38900169 + 60840000 = 6237^2 + 7800^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 99740169 - 2⁷ = 99740041 is a prime.

It is a super-2 number, since 2×99740169² = 19896202624297122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99740129) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28297 + ... + 31625.

Almost surely, 2^99740169 is an apocalyptic number.

99740169 is the 9987-th square number.

99740169 is the 4994-th centered octagonal number.

It is an amenable number.

99740169 is a deficient number, since it is larger than the sum of its proper divisors (44372254).

99740169 is an frugal number, since it uses more digits than its factorization.

99740169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The cubic root of 99740169 is about 463.7565251199.

The spelling of 99740169 in words is "ninety-nine million, seven hundred forty thousand, one hundred sixty-nine".