99191646 has 12 divisors (see below), whose sum is σ = 214915272. Its totient is φ = 33063876.

The previous prime is 99191639. The next prime is 99191671. The reversal of 99191646 is 64619199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2755306 + ... + 2755341.

It is an arithmetic number, because the mean of its divisors is an integer number (17909606).

Almost surely, 2^99191646 is an apocalyptic number.

99191646 is an abundant number, since it is smaller than the sum of its proper divisors (115723626).

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

99191646 is a wasteful number, since it uses less digits than its factorization.

99191646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510655 (or 5510652 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 99191646 is about 9959.5002886691. The cubic root of 99191646 is about 462.9048158650.

The spelling of 99191646 in words is "ninety-nine million, one hundred ninety-one thousand, six hundred forty-six".