991003716 has 36 divisors (see below), whose sum is σ = 2511054000. Its totient is φ = 329541168.

The previous prime is 991003709. The next prime is 991003723. The reversal of 991003716 is 617300199.

It is an interprime number because it is at equal distance from previous prime (991003709) and next prime (991003723).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 17766 + ... + 47933.

It is an arithmetic number, because the mean of its divisors is an integer number (69751500).

Almost surely, 2^991003716 is an apocalyptic number.

It is an amenable number.

991003716 is an abundant number, since it is smaller than the sum of its proper divisors (1520050284).

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

991003716 is a wasteful number, since it uses less digits than its factorization.

991003716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66128 (or 66123 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 991003716 is about 31480.2114986542. The cubic root of 991003716 is about 996.9922008815.

The spelling of 991003716 in words is "nine hundred ninety-one million, three thousand, seven hundred sixteen".