84716991 has 12 divisors (see below), whose sum is σ = 128809720. Its totient is φ = 53505360.

The previous prime is 84716969. The next prime is 84717019. The reversal of 84716991 is 19961748.

It is a happy number.

It is not a de Polignac number, because 84716991 - 2¹⁴ = 84700607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84716911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247540 + ... + 247881.

Almost surely, 2^84716991 is an apocalyptic number.

84716991 is a deficient number, since it is larger than the sum of its proper divisors (44092729).

84716991 is a wasteful number, since it uses less digits than its factorization.

84716991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495446 (or 495443 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 84716991 is about 9204.1833423721. The cubic root of 84716991 is about 439.1944472359.

The spelling of 84716991 in words is "eighty-four million, seven hundred sixteen thousand, nine hundred ninety-one".