991246513 has 8 divisors (see below), whose sum is σ = 995816448. Its totient is φ = 986687664.

The previous prime is 991246499. The next prime is 991246537. The reversal of 991246513 is 315642199.

991246513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 991246513 - 2⁵ = 991246481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991246573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213331 + ... + 217927.

It is an arithmetic number, because the mean of its divisors is an integer number (124477056).

Almost surely, 2^991246513 is an apocalyptic number.

It is an amenable number.

991246513 is a deficient number, since it is larger than the sum of its proper divisors (4569935).

991246513 is a wasteful number, since it uses less digits than its factorization.

991246513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543.

The product of its digits is 58320, while the sum is 40.

The square root of 991246513 is about 31484.0676056954. The cubic root of 991246513 is about 997.0736156281.

The spelling of 991246513 in words is "nine hundred ninety-one million, two hundred forty-six thousand, five hundred thirteen".