991716411 has 16 divisors (see below), whose sum is σ = 1519023104. Its totient is φ = 563756544.

The previous prime is 991716391. The next prime is 991716413. The reversal of 991716411 is 114617199.

It is not a de Polignac number, because 991716411 - 2⁶ = 991716347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 991716411.

It is not an unprimeable number, because it can be changed into a prime (991716413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118291 + ... + 126396.

It is an arithmetic number, because the mean of its divisors is an integer number (94938944).

Almost surely, 2^991716411 is an apocalyptic number.

991716411 is a deficient number, since it is larger than the sum of its proper divisors (527306693).

991716411 is a wasteful number, since it uses less digits than its factorization.

991716411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244890.

The product of its digits is 13608, while the sum is 39.

The square root of 991716411 is about 31491.5291943723. The cubic root of 991716411 is about 997.2311441800.

The spelling of 991716411 in words is "nine hundred ninety-one million, seven hundred sixteen thousand, four hundred eleven".