85654649 has 2 divisors, whose sum is σ = 85654650. Its totient is φ = 85654648.

The previous prime is 85654637. The next prime is 85654651. The reversal of 85654649 is 94645658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53392249 + 32262400 = 7307^2 + 5680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85654649 is a prime.

Together with 85654651, 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 (85654669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42827324 + 42827325.

It is an arithmetic number, because the mean of its divisors is an integer number (42827325).

Almost surely, 2^85654649 is an apocalyptic number.

It is an amenable number.

85654649 is a deficient number, since it is larger than the sum of its proper divisors (1).

85654649 is an equidigital number, since it uses as much as digits as its factorization.

85654649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 47.

The square root of 85654649 is about 9254.9796866336. The cubic root of 85654649 is about 440.8088582277.

The spelling of 85654649 in words is "eighty-five million, six hundred fifty-four thousand, six hundred forty-nine".