85007557 has 2 divisors, whose sum is σ = 85007558. Its totient is φ = 85007556.

The previous prime is 85007491. The next prime is 85007561. The reversal of 85007557 is 75570058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45077796 + 39929761 = 6714^2 + 6319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85007557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85002557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42503778 + 42503779.

It is an arithmetic number, because the mean of its divisors is an integer number (42503779).

Almost surely, 2^85007557 is an apocalyptic number.

It is an amenable number.

85007557 is a deficient number, since it is larger than the sum of its proper divisors (1).

85007557 is an equidigital number, since it uses as much as digits as its factorization.

85007557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 85007557 is about 9219.9542840515. The cubic root of 85007557 is about 439.6959969637.

The spelling of 85007557 in words is "eighty-five million, seven thousand, five hundred fifty-seven".