85853149 has 2 divisors, whose sum is σ = 85853150. Its totient is φ = 85853148.

The previous prime is 85853147. The next prime is 85853189. The reversal of 85853149 is 94135858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43797924 + 42055225 = 6618^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 85853149 - 2¹ = 85853147 is a prime.

Together with 85853147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85853147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42926574 + 42926575.

It is an arithmetic number, because the mean of its divisors is an integer number (42926575).

Almost surely, 2^85853149 is an apocalyptic number.

It is an amenable number.

85853149 is a deficient number, since it is larger than the sum of its proper divisors (1).

85853149 is an equidigital number, since it uses as much as digits as its factorization.

85853149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 43.

The square root of 85853149 is about 9265.6974373222. The cubic root of 85853149 is about 441.1491123905.

The spelling of 85853149 in words is "eighty-five million, eight hundred fifty-three thousand, one hundred forty-nine".