99169691 has 4 divisors (see below), whose sum is σ = 99359832. Its totient is φ = 98979552.

The previous prime is 99169667. The next prime is 99169699. The reversal of 99169691 is 19696199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19696199 = 307 ⋅64157.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99169691 is a prime.

It is a super-2 number, since 2×99169691² = 19669255226070962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99169699) 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, 94286 + ... + 95331.

It is an arithmetic number, because the mean of its divisors is an integer number (24839958).

Almost surely, 2^99169691 is an apocalyptic number.

99169691 is a deficient number, since it is larger than the sum of its proper divisors (190141).

99169691 is a wasteful number, since it uses less digits than its factorization.

99169691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190140.

The product of its digits is 236196, while the sum is 50.

The square root of 99169691 is about 9958.3980137369. The cubic root of 99169691 is about 462.8706603504.

The spelling of 99169691 in words is "ninety-nine million, one hundred sixty-nine thousand, six hundred ninety-one".