85197137 has 8 divisors (see below), whose sum is σ = 86590056. Its totient is φ = 83814912.

The previous prime is 85197127. The next prime is 85197163. The reversal of 85197137 is 73179158.

It can be written as a sum of positive squares in 4 ways, for example, as 53567761 + 31629376 = 7319^2 + 5624^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85197137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85197094 and 85197103.

It is not an unprimeable number, because it can be changed into a prime (85197107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14243 + ... + 19319.

It is an arithmetic number, because the mean of its divisors is an integer number (10823757).

Almost surely, 2^85197137 is an apocalyptic number.

It is an amenable number.

85197137 is a deficient number, since it is larger than the sum of its proper divisors (1392919).

85197137 is a wasteful number, since it uses less digits than its factorization.

85197137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347.

The product of its digits is 52920, while the sum is 41.

The square root of 85197137 is about 9230.2295204399. The cubic root of 85197137 is about 440.0226176390.

The spelling of 85197137 in words is "eighty-five million, one hundred ninety-seven thousand, one hundred thirty-seven".