991283676 has 12 divisors (see below), whose sum is σ = 2312995272. Its totient is φ = 330427888.

The previous prime is 991283669. The next prime is 991283701. The reversal of 991283676 is 676382199.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 41303475 + ... + 41303498.

It is an arithmetic number, because the mean of its divisors is an integer number (192749606).

Almost surely, 2^991283676 is an apocalyptic number.

It is an amenable number.

991283676 is an abundant number, since it is smaller than the sum of its proper divisors (1321711596).

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

991283676 is a wasteful number, since it uses less digits than its factorization.

991283676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82606980 (or 82606978 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 991283676 is about 31484.6577875638. The cubic root of 991283676 is about 997.0860759607.

The spelling of 991283676 in words is "nine hundred ninety-one million, two hundred eighty-three thousand, six hundred seventy-six".