85637089 has 2 divisors, whose sum is σ = 85637090. Its totient is φ = 85637088.

The previous prime is 85637077. The next prime is 85637117. The reversal of 85637089 is 98073658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 21316689 = 8020^2 + 4617^2 .

It is a cyclic number.

It is not a de Polignac number, because 85637089 - 2¹³ = 85628897 is a prime.

It is a super-2 number, since 2×85637089² = 14667422024787842, which contains 22 as substring.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42818544 + 42818545.

It is an arithmetic number, because the mean of its divisors is an integer number (42818545).

Almost surely, 2^85637089 is an apocalyptic number.

It is an amenable number.

85637089 is a deficient number, since it is larger than the sum of its proper divisors (1).

85637089 is an equidigital number, since it uses as much as digits as its factorization.

85637089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 85637089 is about 9254.0309595333. The cubic root of 85637089 is about 440.7787328632.

The spelling of 85637089 in words is "eighty-five million, six hundred thirty-seven thousand, eighty-nine".