84708857 has 2 divisors, whose sum is σ = 84708858. Its totient is φ = 84708856.

The previous prime is 84708853. The next prime is 84708863. The reversal of 84708857 is 75880748.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49056016 + 35652841 = 7004^2 + 5971^2 .

It is a cyclic number.

It is not a de Polignac number, because 84708857 - 2² = 84708853 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84708853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42354428 + 42354429.

It is an arithmetic number, because the mean of its divisors is an integer number (42354429).

Almost surely, 2^84708857 is an apocalyptic number.

It is an amenable number.

84708857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84708857 is an equidigital number, since it uses as much as digits as its factorization.

84708857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 84708857 is about 9203.7414674685. The cubic root of 84708857 is about 439.1803905438.

The spelling of 84708857 in words is "eighty-four million, seven hundred eight thousand, eight hundred fifty-seven".