991416194 has 16 divisors (see below), whose sum is σ = 1493100000. Its totient is φ = 493721184.

The previous prime is 991416191. The next prime is 991416197. The reversal of 991416194 is 491614199.

It is an interprime number because it is at equal distance from previous prime (991416191) and next prime (991416197).

It is not an unprimeable number, because it can be changed into a prime (991416191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944582 + ... + 945630.

It is an arithmetic number, because the mean of its divisors is an integer number (93318750).

Almost surely, 2^991416194 is an apocalyptic number.

991416194 is a deficient number, since it is larger than the sum of its proper divisors (501683806).

991416194 is a wasteful number, since it uses less digits than its factorization.

991416194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497.

The product of its digits is 69984, while the sum is 44.

The square root of 991416194 is about 31486.7622025511. The cubic root of 991416194 is about 997.1305052088.

The spelling of 991416194 in words is "nine hundred ninety-one million, four hundred sixteen thousand, one hundred ninety-four".