99999969 has 8 divisors (see below), whose sum is σ = 133459872. Its totient is φ = 66603360.

The previous prime is 99999959. The next prime is 99999971. The reversal of 99999969 is 96999999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99999969 - 2¹⁹ = 99475681 is a prime.

It is a super-2 number, since 2×99999969² = 19999987600001922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99999959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12004 + ... + 18549.

It is an arithmetic number, because the mean of its divisors is an integer number (16682484).

Almost surely, 2^99999969 is an apocalyptic number.

It is an amenable number.

99999969 is a deficient number, since it is larger than the sum of its proper divisors (33459903).

99999969 is a wasteful number, since it uses less digits than its factorization.

99999969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31647.

The product of its digits is 28697814, while the sum is 69.

The square root of 99999969 is about 9999.9984499999. The cubic root of 99999969 is about 464.1588353982.

The spelling of 99999969 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-nine".