84309287 has 2 divisors, whose sum is σ = 84309288. Its totient is φ = 84309286.

The previous prime is 84309263. The next prime is 84309319. The reversal of 84309287 is 78290348.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84309287 - 2⁶ = 84309223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84309217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42154643 + 42154644.

It is an arithmetic number, because the mean of its divisors is an integer number (42154644).

Almost surely, 2^84309287 is an apocalyptic number.

84309287 is a deficient number, since it is larger than the sum of its proper divisors (1).

84309287 is an equidigital number, since it uses as much as digits as its factorization.

84309287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 84309287 is about 9182.0088760576. The cubic root of 84309287 is about 438.4887668761.

The spelling of 84309287 in words is "eighty-four million, three hundred nine thousand, two hundred eighty-seven".