84308857 has 2 divisors, whose sum is σ = 84308858. Its totient is φ = 84308856.

The previous prime is 84308839. The next prime is 84308867. The reversal of 84308857 is 75880348.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82246761 + 2062096 = 9069^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 84308857 - 2¹¹ = 84306809 is a prime.

It is not a weakly prime, because it can be changed into another prime (84308867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42154428 + 42154429.

It is an arithmetic number, because the mean of its divisors is an integer number (42154429).

Almost surely, 2^84308857 is an apocalyptic number.

It is an amenable number.

84308857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84308857 is an equidigital number, since it uses as much as digits as its factorization.

84308857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 84308857 is about 9181.9854606724. The cubic root of 84308857 is about 438.4880214047.

The spelling of 84308857 in words is "eighty-four million, three hundred eight thousand, eight hundred fifty-seven".