85504537 has 2 divisors, whose sum is σ = 85504538. Its totient is φ = 85504536.

The previous prime is 85504453. The next prime is 85504553. The reversal of 85504537 is 73540558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80209936 + 5294601 = 8956^2 + 2301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85504537 is a prime.

It is a super-2 number, since 2×85504537² = 14622051695168738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85504496 and 85504505.

It is not a weakly prime, because it can be changed into another prime (85504567) 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 as a sum of consecutive naturals, namely, 42752268 + 42752269.

It is an arithmetic number, because the mean of its divisors is an integer number (42752269).

Almost surely, 2^85504537 is an apocalyptic number.

It is an amenable number.

85504537 is a deficient number, since it is larger than the sum of its proper divisors (1).

85504537 is an equidigital number, since it uses as much as digits as its factorization.

85504537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 85504537 is about 9246.8663340615. The cubic root of 85504537 is about 440.5511979875.

The spelling of 85504537 in words is "eighty-five million, five hundred four thousand, five hundred thirty-seven".