1085185493 has 4 divisors (see below), whose sum is σ = 1240212000. Its totient is φ = 930158988.

The previous prime is 1085185489. The next prime is 1085185501. The reversal of 1085185493 is 3945815801.

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: 3945815801 = 89 ⋅44335009.

It is a cyclic number.

It is not a de Polignac number, because 1085185493 - 2² = 1085185489 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 (1085185403) 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, 77513243 + ... + 77513256.

It is an arithmetic number, because the mean of its divisors is an integer number (310053000).

Almost surely, 2^1085185493 is an apocalyptic number.

It is an amenable number.

1085185493 is a deficient number, since it is larger than the sum of its proper divisors (155026507).

1085185493 is an equidigital number, since it uses as much as digits as its factorization.

1085185493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155026506.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 1085185493 is about 32942.1537395478. The cubic root of 1085185493 is about 1027.6249966431.

The spelling of 1085185493 in words is "one billion, eighty-five million, one hundred eighty-five thousand, four hundred ninety-three".