991142716 has 6 divisors (see below), whose sum is σ = 1734499760. Its totient is φ = 495571356.

The previous prime is 991142707. The next prime is 991142723. The reversal of 991142716 is 617241199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123892836 + ... + 123892843.

Almost surely, 2^991142716 is an apocalyptic number.

It is an amenable number.

991142716 is a deficient number, since it is larger than the sum of its proper divisors (743357044).

991142716 is a wasteful number, since it uses less digits than its factorization.

991142716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247785683 (or 247785681 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 991142716 is about 31482.4191573646. The cubic root of 991142716 is about 997.0388120209.

The spelling of 991142716 in words is "nine hundred ninety-one million, one hundred forty-two thousand, seven hundred sixteen".