1649416989 has 8 divisors (see below), whose sum is σ = 2399152032. Its totient is φ = 999646640.

The previous prime is 1649416987. The next prime is 1649416991. The reversal of 1649416989 is 9896149461.

It is an interprime number because it is at equal distance from previous prime (1649416987) and next prime (1649416991).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1649416989 - 2¹ = 1649416987 is a prime.

It is a super-2 number, since 2×1649416989² = 5441152807203652242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649416987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24991134 + ... + 24991199.

It is an arithmetic number, because the mean of its divisors is an integer number (299894004).

Almost surely, 2^1649416989 is an apocalyptic number.

It is an amenable number.

1649416989 is a deficient number, since it is larger than the sum of its proper divisors (749735043).

1649416989 is a wasteful number, since it uses less digits than its factorization.

1649416989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49982347.

The product of its digits is 3359232, while the sum is 57.

The square root of 1649416989 is about 40613.0150198185. The cubic root of 1649416989 is about 1181.5265574800.

The spelling of 1649416989 in words is "one billion, six hundred forty-nine million, four hundred sixteen thousand, nine hundred eighty-nine".