98747021 has 4 divisors (see below), whose sum is σ = 98770044. Its totient is φ = 98724000.

The previous prime is 98747017. The next prime is 98747023. The reversal of 98747021 is 12074789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57002500 + 41744521 = 7550^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 98747021 - 2² = 98747017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98747023) 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 3 ways as a sum of consecutive naturals, for example, 2960 + ... + 14361.

It is an arithmetic number, because the mean of its divisors is an integer number (24692511).

Almost surely, 2^98747021 is an apocalyptic number.

It is an amenable number.

98747021 is a deficient number, since it is larger than the sum of its proper divisors (23023).

98747021 is a wasteful number, since it uses less digits than its factorization.

98747021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23022.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 98747021 is about 9937.1535662885. The cubic root of 98747021 is about 462.2121253106.

The spelling of 98747021 in words is "ninety-eight million, seven hundred forty-seven thousand, twenty-one".