99740161 has 4 divisors (see below), whose sum is σ = 101145024. Its totient is φ = 98335300.

The previous prime is 99740159. The next prime is 99740171. The reversal of 99740161 is 16104799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16104799 = 19 ⋅847621.

It is a cyclic number.

It is not a de Polignac number, because 99740161 - 2¹ = 99740159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99740161.

It is not an unprimeable number, because it can be changed into a prime (99740111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702325 + ... + 702466.

It is an arithmetic number, because the mean of its divisors is an integer number (25286256).

Almost surely, 2^99740161 is an apocalyptic number.

It is an amenable number.

99740161 is a deficient number, since it is larger than the sum of its proper divisors (1404863).

99740161 is a wasteful number, since it uses less digits than its factorization.

99740161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404862.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 99740161 is about 9986.9995994793. Note that the first 3 decimals coincide. The cubic root of 99740161 is about 463.7565127209.

The spelling of 99740161 in words is "ninety-nine million, seven hundred forty thousand, one hundred sixty-one".