89891649 has 6 divisors (see below), whose sum is σ = 129843506. Its totient is φ = 59927760.

The previous prime is 89891647. The next prime is 89891687. The reversal of 89891649 is 94619898.

It can be written as a sum of positive squares in only one way, i.e., 70812225 + 19079424 = 8415^2 + 4368^2 .

It is not a de Polignac number, because 89891649 - 2¹ = 89891647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89891595 and 89891604.

It is not an unprimeable number, because it can be changed into a prime (89891647) 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 5 ways as a sum of consecutive naturals, for example, 4993972 + ... + 4993989.

Almost surely, 2^89891649 is an apocalyptic number.

It is an amenable number.

89891649 is a deficient number, since it is larger than the sum of its proper divisors (39951857).

89891649 is a wasteful number, since it uses less digits than its factorization.

89891649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9987967 (or 9987964 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 89891649 is about 9481.1206616096. The cubic root of 89891649 is about 447.9605636656.

The spelling of 89891649 in words is "eighty-nine million, eight hundred ninety-one thousand, six hundred forty-nine".