991969674 has 8 divisors (see below), whose sum is σ = 1983939360. Its totient is φ = 330656556.

The previous prime is 991969661. The next prime is 991969681. The reversal of 991969674 is 476969199.

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

991969674 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82664134 + ... + 82664145.

It is an arithmetic number, because the mean of its divisors is an integer number (247992420).

Almost surely, 2^991969674 is an apocalyptic number.

991969674 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

991969674 is a wasteful number, since it uses less digits than its factorization.

991969674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165328284.

The product of its digits is 6613488, while the sum is 60.

The square root of 991969674 is about 31495.5500666364. The cubic root of 991969674 is about 997.3160274026.

The spelling of 991969674 in words is "nine hundred ninety-one million, nine hundred sixty-nine thousand, six hundred seventy-four".