85243993 has 4 divisors (see below), whose sum is σ = 85419520. Its totient is φ = 85068468.

The previous prime is 85243987. The next prime is 85243999. The reversal of 85243993 is 39934258.

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 an interprime number because it is at equal distance from previous prime (85243987) and next prime (85243999).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85243993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85243999) 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, 87033 + ... + 88006.

It is an arithmetic number, because the mean of its divisors is an integer number (21354880).

Almost surely, 2^85243993 is an apocalyptic number.

It is an amenable number.

85243993 is a deficient number, since it is larger than the sum of its proper divisors (175527).

85243993 is a wasteful number, since it uses less digits than its factorization.

85243993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175526.

The product of its digits is 233280, while the sum is 43.

The square root of 85243993 is about 9232.7673532912. The cubic root of 85243993 is about 440.1032694932.

The spelling of 85243993 in words is "eighty-five million, two hundred forty-three thousand, nine hundred ninety-three".