84317291 has 2 divisors, whose sum is σ = 84317292. Its totient is φ = 84317290.

The previous prime is 84317213. The next prime is 84317309. The reversal of 84317291 is 19271348.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84317291 is a prime.

It is a Chen prime.

It is equal to p_4906394 and since 84317291 and 4906394 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (84317491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42158645 + 42158646.

It is an arithmetic number, because the mean of its divisors is an integer number (42158646).

Almost surely, 2^84317291 is an apocalyptic number.

84317291 is a deficient number, since it is larger than the sum of its proper divisors (1).

84317291 is an equidigital number, since it uses as much as digits as its factorization.

84317291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 84317291 is about 9182.4447180476. Note that the first 3 decimals coincide. The cubic root of 84317291 is about 438.5026425837.

The spelling of 84317291 in words is "eighty-four million, three hundred seventeen thousand, two hundred ninety-one".