991283084 has 24 divisors (see below), whose sum is σ = 1911195216. Its totient is φ = 446120000.

The previous prime is 991283077. The next prime is 991283093. The reversal of 991283084 is 480382199.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107087 + ... + 115974.

It is an arithmetic number, because the mean of its divisors is an integer number (79633134).

Almost surely, 2^991283084 is an apocalyptic number.

It is an amenable number.

991283084 is a deficient number, since it is larger than the sum of its proper divisors (919912132).

991283084 is a wasteful number, since it uses less digits than its factorization.

991283084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223177 (or 223175 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 991283084 is about 31484.6483861580. The cubic root of 991283084 is about 997.0858774722.

The spelling of 991283084 in words is "nine hundred ninety-one million, two hundred eighty-three thousand, eighty-four".