85830557 has 2 divisors, whose sum is σ = 85830558. Its totient is φ = 85830556.

The previous prime is 85830529. The next prime is 85830583. The reversal of 85830557 is 75503858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84842521 + 988036 = 9211^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 85830557 - 2⁸ = 85830301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85830757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42915278 + 42915279.

It is an arithmetic number, because the mean of its divisors is an integer number (42915279).

Almost surely, 2^85830557 is an apocalyptic number.

It is an amenable number.

85830557 is a deficient number, since it is larger than the sum of its proper divisors (1).

85830557 is an equidigital number, since it uses as much as digits as its factorization.

85830557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 85830557 is about 9264.4782367924. The cubic root of 85830557 is about 441.1104133049.

The spelling of 85830557 in words is "eighty-five million, eight hundred thirty thousand, five hundred fifty-seven".