99689970 has 32 divisors (see below), whose sum is σ = 242831808. Its totient is φ = 26186688.

The previous prime is 99689969. The next prime is 99690011. The reversal of 99689970 is 7998699.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 99689970.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22789 + ... + 26808.

It is an arithmetic number, because the mean of its divisors is an integer number (7588494).

Almost surely, 2^99689970 is an apocalyptic number.

99689970 is an abundant number, since it is smaller than the sum of its proper divisors (143141838).

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

99689970 is a wasteful number, since it uses less digits than its factorization.

99689970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49674.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 99689970 is about 9984.4864665139. The cubic root of 99689970 is about 463.6787095292.

The spelling of 99689970 in words is "ninety-nine million, six hundred eighty-nine thousand, nine hundred seventy".