99139560 has 128 divisors (see below), whose sum is σ = 323930880. Its totient is φ = 24127488.

The previous prime is 99139559. The next prime is 99139561. The reversal of 99139560 is 6593199.

It is an interprime number because it is at equal distance from previous prime (99139559) and next prime (99139561).

It is not an unprimeable number, because it can be changed into a prime (99139561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160372 + ... + 160988.

It is an arithmetic number, because the mean of its divisors is an integer number (2530710).

Almost surely, 2^99139560 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 99139560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161965440).

99139560 is an abundant number, since it is smaller than the sum of its proper divisors (224791320).

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

99139560 is a wasteful number, since it uses less digits than its factorization.

99139560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 99139560 is about 9956.8850550762. The cubic root of 99139560 is about 462.8237771798.

It can be divided in two parts, 99139 and 560, that added together give a palindrome (99699).

The spelling of 99139560 in words is "ninety-nine million, one hundred thirty-nine thousand, five hundred sixty".