85430237 has 2 divisors, whose sum is σ = 85430238. Its totient is φ = 85430236.

The previous prime is 85430231. The next prime is 85430249. The reversal of 85430237 is 73203458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84529636 + 900601 = 9194^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 85430237 - 2⁶ = 85430173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85430231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42715118 + 42715119.

It is an arithmetic number, because the mean of its divisors is an integer number (42715119).

Almost surely, 2^85430237 is an apocalyptic number.

It is an amenable number.

85430237 is a deficient number, since it is larger than the sum of its proper divisors (1).

85430237 is an equidigital number, since it uses as much as digits as its factorization.

85430237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 85430237 is about 9242.8478836341. The cubic root of 85430237 is about 440.4235539235.

The spelling of 85430237 in words is "eighty-five million, four hundred thirty thousand, two hundred thirty-seven".