98783621 has 4 divisors (see below), whose sum is σ = 98803500. Its totient is φ = 98763744.

The previous prime is 98783611. The next prime is 98783627. The reversal of 98783621 is 12638789.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 29311396 + 69472225 = 5414^2 + 8335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98783621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98783627) 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, 4955 + ... + 14903.

It is an arithmetic number, because the mean of its divisors is an integer number (24700875).

Almost surely, 2^98783621 is an apocalyptic number.

It is an amenable number.

98783621 is a deficient number, since it is larger than the sum of its proper divisors (19879).

98783621 is an equidigital number, since it uses as much as digits as its factorization.

98783621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19878.

The product of its digits is 145152, while the sum is 44.

The square root of 98783621 is about 9938.9949693115. The cubic root of 98783621 is about 462.2692236548.

The spelling of 98783621 in words is "ninety-eight million, seven hundred eighty-three thousand, six hundred twenty-one".