85844537 has 2 divisors, whose sum is σ = 85844538. Its totient is φ = 85844536.

The previous prime is 85844531. The next prime is 85844567. The reversal of 85844537 is 73544858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61795321 + 24049216 = 7861^2 + 4904^2 .

It is a cyclic number.

It is not a de Polignac number, because 85844537 - 2²⁰ = 84795961 is a prime.

It is not a weakly prime, because it can be changed into another prime (85844531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42922268 + 42922269.

It is an arithmetic number, because the mean of its divisors is an integer number (42922269).

Almost surely, 2^85844537 is an apocalyptic number.

It is an amenable number.

85844537 is a deficient number, since it is larger than the sum of its proper divisors (1).

85844537 is an equidigital number, since it uses as much as digits as its factorization.

85844537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 44.

The square root of 85844537 is about 9265.2327008014. The cubic root of 85844537 is about 441.1343612204.

The spelling of 85844537 in words is "eighty-five million, eight hundred forty-four thousand, five hundred thirty-seven".