991714500 has 288 divisors, whose sum is σ = 3765914880. Its totient is φ = 214617600.

The previous prime is 991714489. The next prime is 991714531. The reversal of 991714500 is 5417199.

991714500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 597672 + ... + 599328.

Almost surely, 2^991714500 is an apocalyptic number.

991714500 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 991714500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882957440).

991714500 is an abundant number, since it is smaller than the sum of its proper divisors (2774200380).

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

991714500 is a wasteful number, since it uses less digits than its factorization.

991714500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708 (or 1693 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 991714500 is about 31491.4988528650. The cubic root of 991714500 is about 997.2305036373.

The spelling of 991714500 in words is "nine hundred ninety-one million, seven hundred fourteen thousand, five hundred".