98638013 has 2 divisors, whose sum is σ = 98638014. Its totient is φ = 98638012.

The previous prime is 98638009. The next prime is 98638021. The reversal of 98638013 is 31083689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97673689 + 964324 = 9883^2 + 982^2 .

It is a cyclic number.

It is not a de Polignac number, because 98638013 - 2² = 98638009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98638073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49319006 + 49319007.

It is an arithmetic number, because the mean of its divisors is an integer number (49319007).

Almost surely, 2^98638013 is an apocalyptic number.

It is an amenable number.

98638013 is a deficient number, since it is larger than the sum of its proper divisors (1).

98638013 is an equidigital number, since it uses as much as digits as its factorization.

98638013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 98638013 is about 9931.6671812944. The cubic root of 98638013 is about 462.0419822172.

The spelling of 98638013 in words is "ninety-eight million, six hundred thirty-eight thousand, thirteen".