85990937 has 2 divisors, whose sum is σ = 85990938. Its totient is φ = 85990936.

The previous prime is 85990921. The next prime is 85990939. The reversal of 85990937 is 73909958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85303696 + 687241 = 9236^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 85990937 - 2⁴ = 85990921 is a prime.

It is a super-2 number, since 2×85990937² = 14788882492275938, which contains 22 as substring.

Together with 85990939, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85990939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42995468 + 42995469.

It is an arithmetic number, because the mean of its divisors is an integer number (42995469).

Almost surely, 2^85990937 is an apocalyptic number.

It is an amenable number.

85990937 is a deficient number, since it is larger than the sum of its proper divisors (1).

85990937 is an equidigital number, since it uses as much as digits as its factorization.

85990937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 85990937 is about 9273.1298384095. The cubic root of 85990937 is about 441.3849902239.

The spelling of 85990937 in words is "eighty-five million, nine hundred ninety thousand, nine hundred thirty-seven".