85385138 has 4 divisors (see below), whose sum is σ = 128077710. Its totient is φ = 42692568.

The previous prime is 85385137. The next prime is 85385147. The reversal of 85385138 is 83158358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83158358 = 2 ⋅41579179.

It can be written as a sum of positive squares in only one way, i.e., 73736569 + 11648569 = 8587^2 + 3413^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85385095 and 85385104.

It is not an unprimeable number, because it can be changed into a prime (85385137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21346283 + ... + 21346286.

Almost surely, 2^85385138 is an apocalyptic number.

85385138 is a deficient number, since it is larger than the sum of its proper divisors (42692572).

85385138 is a wasteful number, since it uses less digits than its factorization.

85385138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42692571.

The product of its digits is 115200, while the sum is 41.

The square root of 85385138 is about 9240.4078914299. The cubic root of 85385138 is about 440.3460397678.

The spelling of 85385138 in words is "eighty-five million, three hundred eighty-five thousand, one hundred thirty-eight".