85403237 has 2 divisors, whose sum is σ = 85403238. Its totient is φ = 85403236.

The previous prime is 85403207. The next prime is 85403239. The reversal of 85403237 is 73230458.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57851236 + 27552001 = 7606^2 + 5249^2 .

It is a cyclic number.

It is not a de Polignac number, because 85403237 - 2¹⁶ = 85337701 is a prime.

Together with 85403239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85403239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42701618 + 42701619.

It is an arithmetic number, because the mean of its divisors is an integer number (42701619).

Almost surely, 2^85403237 is an apocalyptic number.

It is an amenable number.

85403237 is a deficient number, since it is larger than the sum of its proper divisors (1).

85403237 is an equidigital number, since it uses as much as digits as its factorization.

85403237 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 85403237 is about 9241.3871794228. The cubic root of 85403237 is about 440.3771508023.

The spelling of 85403237 in words is "eighty-five million, four hundred three thousand, two hundred thirty-seven".