84975857 has 2 divisors, whose sum is σ = 84975858. Its totient is φ = 84975856.

The previous prime is 84975851. The next prime is 84975889. The reversal of 84975857 is 75857948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55338721 + 29637136 = 7439^2 + 5444^2 .

It is a cyclic number.

It is not a de Polignac number, because 84975857 - 2⁴ = 84975841 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84975799 and 84975808.

It is not a weakly prime, because it can be changed into another prime (84975851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42487928 + 42487929.

It is an arithmetic number, because the mean of its divisors is an integer number (42487929).

Almost surely, 2^84975857 is an apocalyptic number.

It is an amenable number.

84975857 is a deficient number, since it is larger than the sum of its proper divisors (1).

84975857 is an equidigital number, since it uses as much as digits as its factorization.

84975857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 53.

The square root of 84975857 is about 9218.2350262944. The cubic root of 84975857 is about 439.6413347802.

The spelling of 84975857 in words is "eighty-four million, nine hundred seventy-five thousand, eight hundred fifty-seven".