991513214 has 24 divisors (see below), whose sum is σ = 1577861208. Its totient is φ = 467213040.

The previous prime is 991513183. The next prime is 991513217. The reversal of 991513214 is 412315199.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991513217) 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 11 ways as a sum of consecutive naturals, for example, 138749 + ... + 145719.

It is an arithmetic number, because the mean of its divisors is an integer number (65744217).

Almost surely, 2^991513214 is an apocalyptic number.

991513214 is a deficient number, since it is larger than the sum of its proper divisors (586347994).

991513214 is a wasteful number, since it uses less digits than its factorization.

991513214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7208 (or 7189 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 991513214 is about 31488.3028123143. The cubic root of 991513214 is about 997.1630305487.

The spelling of 991513214 in words is "nine hundred ninety-one million, five hundred thirteen thousand, two hundred fourteen".