85185149 has 4 divisors (see below), whose sum is σ = 97354464. Its totient is φ = 73015836.

The previous prime is 85185143. The next prime is 85185157. The reversal of 85185149 is 94158158.

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 a de Polignac number, because none of the positive numbers 2^k-85185149 is a prime.

It is a super-2 number, since 2×85185149² = 14513019220304402, 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 (85185143) 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, 6084647 + ... + 6084660.

It is an arithmetic number, because the mean of its divisors is an integer number (24338616).

Almost surely, 2^85185149 is an apocalyptic number.

It is an amenable number.

85185149 is a deficient number, since it is larger than the sum of its proper divisors (12169315).

85185149 is a wasteful number, since it uses less digits than its factorization.

85185149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12169314.

The product of its digits is 57600, while the sum is 41.

The square root of 85185149 is about 9229.5801096258. The cubic root of 85185149 is about 440.0019782969.

The spelling of 85185149 in words is "eighty-five million, one hundred eighty-five thousand, one hundred forty-nine".