991283083 has 6 divisors (see below), whose sum is σ = 1153125276. Its totient is φ = 849671172.

The previous prime is 991283077. The next prime is 991283093. The reversal of 991283083 is 380382199.

It is a happy number.

It is not a de Polignac number, because 991283083 - 2¹³ = 991274891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991283093) 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 5 ways as a sum of consecutive naturals, for example, 10115085 + ... + 10115182.

It is an arithmetic number, because the mean of its divisors is an integer number (192187546).

Almost surely, 2^991283083 is an apocalyptic number.

991283083 is a deficient number, since it is larger than the sum of its proper divisors (161842193).

991283083 is a wasteful number, since it uses less digits than its factorization.

991283083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20230281 (or 20230274 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 991283083 is about 31484.6483702772. The cubic root of 991283083 is about 997.0858771370.

The spelling of 991283083 in words is "nine hundred ninety-one million, two hundred eighty-three thousand, eighty-three".