99539730 has 24 divisors (see below), whose sum is σ = 258803532. Its totient is φ = 26543904.

The previous prime is 99539719. The next prime is 99539747. The reversal of 99539730 is 3793599.

It can be written as a sum of positive squares in 2 ways, for example, as 94887081 + 4652649 = 9741^2 + 2157^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552909 + ... + 553088.

Almost surely, 2^99539730 is an apocalyptic number.

99539730 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99539730 is an abundant number, since it is smaller than the sum of its proper divisors (159263802).

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

99539730 is a wasteful number, since it uses less digits than its factorization.

99539730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106010 (or 1106007 counting only the distinct ones).

The product of its (nonzero) digits is 229635, while the sum is 45.

The square root of 99539730 is about 9976.9599578228. The cubic root of 99539730 is about 463.4456599575.

It can be divided in two parts, 9953 and 9730, that added together give a 9-th power (19683 = 3⁹).

The spelling of 99539730 in words is "ninety-nine million, five hundred thirty-nine thousand, seven hundred thirty".