98720001 has 6 divisors (see below), whose sum is σ = 142595570. Its totient is φ = 65813328.

The previous prime is 98719997. The next prime is 98720009. The reversal of 98720001 is 10002789.

It can be written as a sum of positive squares in only one way, i.e., 84272400 + 14447601 = 9180^2 + 3801^2 .

It is not a de Polignac number, because 98720001 - 2² = 98719997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98720009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5484436 + ... + 5484453.

Almost surely, 2^98720001 is an apocalyptic number.

It is an amenable number.

98720001 is a deficient number, since it is larger than the sum of its proper divisors (43875569).

98720001 is a wasteful number, since it uses less digits than its factorization.

98720001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968895 (or 10968892 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 98720001 is about 9935.7939290225. The cubic root of 98720001 is about 462.1699633268.

The spelling of 98720001 in words is "ninety-eight million, seven hundred twenty thousand, one".