84072191 has 12 divisors (see below), whose sum is σ = 103552128. Its totient is φ = 67822272.

The previous prime is 84072187. The next prime is 84072239. The reversal of 84072191 is 19127048.

It is not a de Polignac number, because 84072191 - 2² = 84072187 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 (84072101) 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, 49631 + ... + 51296.

It is an arithmetic number, because the mean of its divisors is an integer number (8629344).

Almost surely, 2^84072191 is an apocalyptic number.

84072191 is a deficient number, since it is larger than the sum of its proper divisors (19479937).

84072191 is a wasteful number, since it uses less digits than its factorization.

84072191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100958 (or 100951 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 84072191 is about 9169.0888860344. The cubic root of 84072191 is about 438.0773391229.

The spelling of 84072191 in words is "eighty-four million, seventy-two thousand, one hundred ninety-one".