85965637 has 2 divisors, whose sum is σ = 85965638. Its totient is φ = 85965636.

The previous prime is 85965613. The next prime is 85965641. The reversal of 85965637 is 73656958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 17969121 = 8246^2 + 4239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85965637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85965037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42982818 + 42982819.

It is an arithmetic number, because the mean of its divisors is an integer number (42982819).

Almost surely, 2^85965637 is an apocalyptic number.

It is an amenable number.

85965637 is a deficient number, since it is larger than the sum of its proper divisors (1).

85965637 is an equidigital number, since it uses as much as digits as its factorization.

85965637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 49.

The square root of 85965637 is about 9271.7655815923. The cubic root of 85965637 is about 441.3416983143.

The spelling of 85965637 in words is "eighty-five million, nine hundred sixty-five thousand, six hundred thirty-seven".