99531620 has 12 divisors (see below), whose sum is σ = 209016444. Its totient is φ = 39812640.

The previous prime is 99531613. The next prime is 99531623. The reversal of 99531620 is 2613599.

It can be written as a sum of positive squares in 2 ways, for example, as 20286016 + 79245604 = 4504^2 + 8902^2 .

It is not an unprimeable number, because it can be changed into a prime (99531623) 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 3 ways as a sum of consecutive naturals, for example, 2488271 + ... + 2488310.

It is an arithmetic number, because the mean of its divisors is an integer number (17418037).

Almost surely, 2^99531620 is an apocalyptic number.

It is an amenable number.

99531620 is an abundant number, since it is smaller than the sum of its proper divisors (109484824).

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

99531620 is a wasteful number, since it uses less digits than its factorization.

99531620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976590 (or 4976588 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 99531620 is about 9976.5535131126. The cubic root of 99531620 is about 463.4330732032.

The spelling of 99531620 in words is "ninety-nine million, five hundred thirty-one thousand, six hundred twenty".