991100313 has 48 divisors (see below), whose sum is σ = 1725850560. Its totient is φ = 560431872.

The previous prime is 991100311. The next prime is 991100329. The reversal of 991100313 is 313001199.

It is not a de Polignac number, because 991100313 - 2¹ = 991100311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (991100311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124470 + ... + 132192.

It is an arithmetic number, because the mean of its divisors is an integer number (35955220).

Almost surely, 2^991100313 is an apocalyptic number.

It is an amenable number.

991100313 is a deficient number, since it is larger than the sum of its proper divisors (734750247).

991100313 is a wasteful number, since it uses less digits than its factorization.

991100313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7830 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 991100313 is about 31481.7457108084. The cubic root of 991100313 is about 997.0245934027.

The spelling of 991100313 in words is "nine hundred ninety-one million, one hundred thousand, three hundred thirteen".