99967620 has 24 divisors (see below), whose sum is σ = 279909504. Its totient is φ = 26658016.

The previous prime is 99967619. The next prime is 99967649. The reversal of 99967620 is 2676999.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 99967620.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 833004 + ... + 833123.

It is an arithmetic number, because the mean of its divisors is an integer number (11662896).

Almost surely, 2^99967620 is an apocalyptic number.

It is an amenable number.

99967620 is an abundant number, since it is smaller than the sum of its proper divisors (179941884).

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

99967620 is a wasteful number, since it uses less digits than its factorization.

99967620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666139 (or 1666137 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 99967620 is about 9998.3808689207. The cubic root of 99967620 is about 464.1087797376.

The spelling of 99967620 in words is "ninety-nine million, nine hundred sixty-seven thousand, six hundred twenty".