85147191 has 6 divisors (see below), whose sum is σ = 122990400. Its totient is φ = 56764788.

The previous prime is 85147187. The next prime is 85147193. The reversal of 85147191 is 19174158.

It is not a de Polignac number, because 85147191 - 2² = 85147187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85147193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4730391 + ... + 4730408.

It is an arithmetic number, because the mean of its divisors is an integer number (20498400).

Almost surely, 2^85147191 is an apocalyptic number.

85147191 is a deficient number, since it is larger than the sum of its proper divisors (37843209).

85147191 is a wasteful number, since it uses less digits than its factorization.

85147191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460805 (or 9460802 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 85147191 is about 9227.5235572715. The cubic root of 85147191 is about 439.9366144918.

The spelling of 85147191 in words is "eighty-five million, one hundred forty-seven thousand, one hundred ninety-one".