99691814 has 8 divisors (see below), whose sum is σ = 149638320. Its totient is φ = 49812376.

The previous prime is 99691811. The next prime is 99691831. The reversal of 99691814 is 41819699.

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

It is a super-2 number, since 2×99691814² = 19876915557221192, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99691811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12869 + ... + 19104.

It is an arithmetic number, because the mean of its divisors is an integer number (18704790).

Almost surely, 2^99691814 is an apocalyptic number.

99691814 is a deficient number, since it is larger than the sum of its proper divisors (49946506).

99691814 is a wasteful number, since it uses less digits than its factorization.

99691814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33534.

The product of its digits is 139968, while the sum is 47.

The square root of 99691814 is about 9984.5788093439. The cubic root of 99691814 is about 463.6815684536.

The spelling of 99691814 in words is "ninety-nine million, six hundred ninety-one thousand, eight hundred fourteen".