85039557 has 4 divisors (see below), whose sum is σ = 113386080. Its totient is φ = 56693036.

The previous prime is 85039531. The next prime is 85039621. The reversal of 85039557 is 75593058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85039557 - 2¹⁰ = 85038533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85039517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14173257 + ... + 14173262.

It is an arithmetic number, because the mean of its divisors is an integer number (28346520).

Almost surely, 2^85039557 is an apocalyptic number.

It is an amenable number.

85039557 is a deficient number, since it is larger than the sum of its proper divisors (28346523).

85039557 is a wasteful number, since it uses less digits than its factorization.

85039557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28346522.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 85039557 is about 9221.6894872903. The cubic root of 85039557 is about 439.7511626739.

The spelling of 85039557 in words is "eighty-five million, thirty-nine thousand, five hundred fifty-seven".