85406837 has 2 divisors, whose sum is σ = 85406838. Its totient is φ = 85406836.

The previous prime is 85406831. The next prime is 85406887. The reversal of 85406837 is 73860458.

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., 55965361 + 29441476 = 7481^2 + 5426^2 .

It is a cyclic number.

It is not a de Polignac number, because 85406837 - 2¹⁰ = 85405813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85406794 and 85406803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85406831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42703418 + 42703419.

It is an arithmetic number, because the mean of its divisors is an integer number (42703419).

Almost surely, 2^85406837 is an apocalyptic number.

It is an amenable number.

85406837 is a deficient number, since it is larger than the sum of its proper divisors (1).

85406837 is an equidigital number, since it uses as much as digits as its factorization.

85406837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 85406837 is about 9241.5819533238. The cubic root of 85406837 is about 440.3833384501.

The spelling of 85406837 in words is "eighty-five million, four hundred six thousand, eight hundred thirty-seven".