85374857 has 2 divisors, whose sum is σ = 85374858. Its totient is φ = 85374856.

The previous prime is 85374769. The next prime is 85374893. The reversal of 85374857 is 75847358.

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., 85082176 + 292681 = 9224^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 85374857 - 2²⁶ = 18265993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85374557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42687428 + 42687429.

It is an arithmetic number, because the mean of its divisors is an integer number (42687429).

Almost surely, 2^85374857 is an apocalyptic number.

It is an amenable number.

85374857 is a deficient number, since it is larger than the sum of its proper divisors (1).

85374857 is an equidigital number, since it uses as much as digits as its factorization.

85374857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940800, while the sum is 47.

The square root of 85374857 is about 9239.8515680719. The cubic root of 85374857 is about 440.3283654220.

The spelling of 85374857 in words is "eighty-five million, three hundred seventy-four thousand, eight hundred fifty-seven".