85403557 has 4 divisors (see below), whose sum is σ = 86606496. Its totient is φ = 84200620.

The previous prime is 85403519. The next prime is 85403561. The reversal of 85403557 is 75530458.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75530458 = 2 ⋅37765229.

It is a cyclic number.

It is not a de Polignac number, because 85403557 - 2¹¹ = 85401509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85403567) 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, 601363 + ... + 601504.

It is an arithmetic number, because the mean of its divisors is an integer number (21651624).

Almost surely, 2^85403557 is an apocalyptic number.

It is an amenable number.

85403557 is a deficient number, since it is larger than the sum of its proper divisors (1202939).

85403557 is a wasteful number, since it uses less digits than its factorization.

85403557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202938.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 85403557 is about 9241.4044928247. The cubic root of 85403557 is about 440.3777008224.

The spelling of 85403557 in words is "eighty-five million, four hundred three thousand, five hundred fifty-seven".