84660857 has 2 divisors, whose sum is σ = 84660858. Its totient is φ = 84660856.

The previous prime is 84660809. The next prime is 84660883. The reversal of 84660857 is 75806648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 33051001 = 7184^2 + 5749^2 .

It is a cyclic number.

It is not a de Polignac number, because 84660857 - 2⁸ = 84660601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84660887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42330428 + 42330429.

It is an arithmetic number, because the mean of its divisors is an integer number (42330429).

Almost surely, 2^84660857 is an apocalyptic number.

It is an amenable number.

84660857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84660857 is an equidigital number, since it uses as much as digits as its factorization.

84660857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 84660857 is about 9201.1334627860. The cubic root of 84660857 is about 439.0974214875.

The spelling of 84660857 in words is "eighty-four million, six hundred sixty thousand, eight hundred fifty-seven".