99161899 has 4 divisors (see below), whose sum is σ = 99660400. Its totient is φ = 98663400.

The previous prime is 99161879. The next prime is 99161917. The reversal of 99161899 is 99816199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99161899 - 2¹⁵ = 99129131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99161819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248952 + ... + 249349.

It is an arithmetic number, because the mean of its divisors is an integer number (24915100).

Almost surely, 2^99161899 is an apocalyptic number.

99161899 is a deficient number, since it is larger than the sum of its proper divisors (498501).

99161899 is a wasteful number, since it uses less digits than its factorization.

99161899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498500.

The product of its digits is 314928, while the sum is 52.

The square root of 99161899 is about 9958.0067784673. The cubic root of 99161899 is about 462.8585370809.

The spelling of 99161899 in words is "ninety-nine million, one hundred sixty-one thousand, eight hundred ninety-nine".