85393557 has 6 divisors (see below), whose sum is σ = 123346262. Its totient is φ = 56929032.

The previous prime is 85393537. The next prime is 85393559. The reversal of 85393557 is 75539358.

85393557 is a `hidden beast` number, since 8 + 5 + 3 + 93 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62869041 + 22524516 = 7929^2 + 4746^2 .

It is not a de Polignac number, because 85393557 - 2⁶ = 85393493 is a prime.

It is a super-2 number, since 2×85393557² = 14584119154224498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85393559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4744078 + ... + 4744095.

Almost surely, 2^85393557 is an apocalyptic number.

It is an amenable number.

85393557 is a deficient number, since it is larger than the sum of its proper divisors (37952705).

85393557 is a wasteful number, since it uses less digits than its factorization.

85393557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488179 (or 9488176 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 85393557 is about 9240.8634336841. The cubic root of 85393557 is about 440.3605120423.

The spelling of 85393557 in words is "eighty-five million, three hundred ninety-three thousand, five hundred fifty-seven".