985662649 has 2 divisors, whose sum is σ = 985662650. Its totient is φ = 985662648.

The previous prime is 985662589. The next prime is 985662731. The reversal of 985662649 is 946266589.

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., 976250025 + 9412624 = 31245^2 + 3068^2 .

It is a cyclic number.

It is not a de Polignac number, because 985662649 - 2²⁵ = 952108217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 985662649.

It is not a weakly prime, because it can be changed into another prime (985662749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492831324 + 492831325.

It is an arithmetic number, because the mean of its divisors is an integer number (492831325).

Almost surely, 2^985662649 is an apocalyptic number.

It is an amenable number.

985662649 is a deficient number, since it is larger than the sum of its proper divisors (1).

985662649 is an equidigital number, since it uses as much as digits as its factorization.

985662649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 55.

The square root of 985662649 is about 31395.2647544180. The cubic root of 985662649 is about 995.1978593586.

The spelling of 985662649 in words is "nine hundred eighty-five million, six hundred sixty-two thousand, six hundred forty-nine".