85186537 has 2 divisors, whose sum is σ = 85186538. Its totient is φ = 85186536.

The previous prime is 85186447. The next prime is 85186553. The reversal of 85186537 is 73568158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71503936 + 13682601 = 8456^2 + 3699^2 .

It is a cyclic number.

It is not a de Polignac number, because 85186537 - 2¹⁵ = 85153769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85186493 and 85186502.

It is not a weakly prime, because it can be changed into another prime (85186597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42593268 + 42593269.

It is an arithmetic number, because the mean of its divisors is an integer number (42593269).

Almost surely, 2^85186537 is an apocalyptic number.

It is an amenable number.

85186537 is a deficient number, since it is larger than the sum of its proper divisors (1).

85186537 is an equidigital number, since it uses as much as digits as its factorization.

85186537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 85186537 is about 9229.6553023393. The cubic root of 85186537 is about 440.0043680696.

The spelling of 85186537 in words is "eighty-five million, one hundred eighty-six thousand, five hundred thirty-seven".