85654637 has 2 divisors, whose sum is σ = 85654638. Its totient is φ = 85654636.

The previous prime is 85654631. The next prime is 85654649. The reversal of 85654637 is 73645658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 15413476 = 8381^2 + 3926^2 .

It is a cyclic number.

It is not a de Polignac number, because 85654637 - 2⁶ = 85654573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85654631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42827318 + 42827319.

It is an arithmetic number, because the mean of its divisors is an integer number (42827319).

Almost surely, 2^85654637 is an apocalyptic number.

It is an amenable number.

85654637 is a deficient number, since it is larger than the sum of its proper divisors (1).

85654637 is an equidigital number, since it uses as much as digits as its factorization.

85654637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 44.

The square root of 85654637 is about 9254.9790383339. The cubic root of 85654637 is about 440.8088376423.

The spelling of 85654637 in words is "eighty-five million, six hundred fifty-four thousand, six hundred thirty-seven".