185385457 has 4 divisors (see below), whose sum is σ = 185782896. Its totient is φ = 184988020.

The previous prime is 185385419. The next prime is 185385461. The reversal of 185385457 is 754583581.

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 185385457 - 2²⁷ = 51167729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185385407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198019 + ... + 198952.

It is an arithmetic number, because the mean of its divisors is an integer number (46445724).

Almost surely, 2^185385457 is an apocalyptic number.

It is an amenable number.

185385457 is a deficient number, since it is larger than the sum of its proper divisors (397439).

185385457 is an equidigital number, since it uses as much as digits as its factorization.

185385457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397438.

The product of its digits is 672000, while the sum is 46.

The square root of 185385457 is about 13615.6328167295. The cubic root of 185385457 is about 570.1973841898.

The spelling of 185385457 in words is "one hundred eighty-five million, three hundred eighty-five thousand, four hundred fifty-seven".