986399649 has 45 divisors (see below), whose sum is σ = 1557603203. Its totient is φ = 601506864.

The previous prime is 986399587. The next prime is 986399651. The reversal of 986399649 is 946993689.

The square root of 986399649 is 31407.

It is a perfect power (a square), and thus also a powerful number.

986399649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 517244049 + 469155600 = 22743^2 + 21660^2 .

It is not a de Polignac number, because 986399649 - 2¹³ = 986391457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (986399699) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 34013767 + ... + 34013795.

Almost surely, 2^986399649 is an apocalyptic number.

986399649 is the 31407-th square number.

986399649 is the 15704-th centered octagonal number.

It is an amenable number.

986399649 is a deficient number, since it is larger than the sum of its proper divisors (571203554).

986399649 is an frugal number, since it uses more digits than its factorization.

986399649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 51 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The cubic root of 986399649 is about 995.4458407855.

The spelling of 986399649 in words is "nine hundred eighty-six million, three hundred ninety-nine thousand, six hundred forty-nine".