85478137 has 4 divisors (see below), whose sum is σ = 85687540. Its totient is φ = 85268736.

The previous prime is 85478119. The next prime is 85478149. The reversal of 85478137 is 73187458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73187458 = 2 ⋅36593729.

It can be written as a sum of positive squares in 2 ways, for example, as 82882816 + 2595321 = 9104^2 + 1611^2 .

It is a cyclic number.

It is not a de Polignac number, because 85478137 - 2⁷ = 85478009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85478093 and 85478102.

It is not an unprimeable number, because it can be changed into a prime (85470137) 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, 104088 + ... + 104905.

It is an arithmetic number, because the mean of its divisors is an integer number (21421885).

Almost surely, 2^85478137 is an apocalyptic number.

It is an amenable number.

85478137 is a deficient number, since it is larger than the sum of its proper divisors (209403).

85478137 is a wasteful number, since it uses less digits than its factorization.

85478137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209402.

The product of its digits is 188160, while the sum is 43.

The square root of 85478137 is about 9245.4387132250. The cubic root of 85478137 is about 440.5058524451.

The spelling of 85478137 in words is "eighty-five million, four hundred seventy-eight thousand, one hundred thirty-seven".