99161400 has 96 divisors (see below), whose sum is σ = 331072560. Its totient is φ = 24407040.

The previous prime is 99161389. The next prime is 99161401. The reversal of 99161400 is 416199.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99161401) 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 23 ways as a sum of consecutive naturals, for example, 1444 + ... + 14156.

Almost surely, 2^99161400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99161400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165536280).

99161400 is an abundant number, since it is smaller than the sum of its proper divisors (231911160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99161400 is a wasteful number, since it uses less digits than its factorization.

99161400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12745 (or 12736 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 99161400 is about 9957.9817232208. The cubic root of 99161400 is about 462.8577606846.

Adding to 99161400 its reverse (416199), we get a palindrome (99577599).

The spelling of 99161400 in words is "ninety-nine million, one hundred sixty-one thousand, four hundred".