98668649 has 4 divisors (see below), whose sum is σ = 98731140. Its totient is φ = 98606160.

The previous prime is 98668631. The next prime is 98668679. The reversal of 98668649 is 94686689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94686689 = 421 ⋅224909.

It can be written as a sum of positive squares in 2 ways, for example, as 74511424 + 24157225 = 8632^2 + 4915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98668649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 98668594 and 98668603.

It is not an unprimeable number, because it can be changed into a prime (98668679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28814 + ... + 32055.

It is an arithmetic number, because the mean of its divisors is an integer number (24682785).

Almost surely, 2^98668649 is an apocalyptic number.

It is an amenable number.

98668649 is a deficient number, since it is larger than the sum of its proper divisors (62491).

98668649 is a wasteful number, since it uses less digits than its factorization.

98668649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62490.

The product of its digits is 4478976, while the sum is 56.

The square root of 98668649 is about 9933.2094007929. The cubic root of 98668649 is about 462.0898125026.

The spelling of 98668649 in words is "ninety-eight million, six hundred sixty-eight thousand, six hundred forty-nine".