98219509 has 2 divisors, whose sum is σ = 98219510. Its totient is φ = 98219508.

The previous prime is 98219507. The next prime is 98219543. The reversal of 98219509 is 90591289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85100625 + 13118884 = 9225^2 + 3622^2 .

It is a cyclic number.

It is not a de Polignac number, because 98219509 - 2¹ = 98219507 is a prime.

Together with 98219507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98219507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49109754 + 49109755.

It is an arithmetic number, because the mean of its divisors is an integer number (49109755).

Almost surely, 2^98219509 is an apocalyptic number.

It is an amenable number.

98219509 is a deficient number, since it is larger than the sum of its proper divisors (1).

98219509 is an equidigital number, since it uses as much as digits as its factorization.

98219509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 98219509 is about 9910.5756139591. The cubic root of 98219509 is about 461.3876011739.

The spelling of 98219509 in words is "ninety-eight million, two hundred nineteen thousand, five hundred nine".