85109137 has 4 divisors (see below), whose sum is σ = 85410160. Its totient is φ = 84808116.

The previous prime is 85109119. The next prime is 85109159. The reversal of 85109137 is 73190158.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73190158 = 2 ⋅36595079.

It is a cyclic number.

It is not a de Polignac number, because 85109137 - 2²³ = 76720529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85109197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150087 + ... + 150652.

It is an arithmetic number, because the mean of its divisors is an integer number (21352540).

Almost surely, 2^85109137 is an apocalyptic number.

It is an amenable number.

85109137 is a deficient number, since it is larger than the sum of its proper divisors (301023).

85109137 is a wasteful number, since it uses less digits than its factorization.

85109137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301022.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 85109137 is about 9225.4613434776. The cubic root of 85109137 is about 439.8710658720.

The spelling of 85109137 in words is "eighty-five million, one hundred nine thousand, one hundred thirty-seven".