99774091 has 4 divisors (see below), whose sum is σ = 101896992. Its totient is φ = 97651192.

The previous prime is 99774067. The next prime is 99774119. The reversal of 99774091 is 19047799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99774091 - 2⁷ = 99773963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99774001) 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, 1061380 + ... + 1061473.

It is an arithmetic number, because the mean of its divisors is an integer number (25474248).

Almost surely, 2^99774091 is an apocalyptic number.

99774091 is a deficient number, since it is larger than the sum of its proper divisors (2122901).

99774091 is a wasteful number, since it uses less digits than its factorization.

99774091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122900.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 99774091 is about 9988.6981634245. The cubic root of 99774091 is about 463.8090942633.

The spelling of 99774091 in words is "ninety-nine million, seven hundred seventy-four thousand, ninety-one".