98139021 has 4 divisors (see below), whose sum is σ = 130852032. Its totient is φ = 65426012.

The previous prime is 98138983. The next prime is 98139061. The reversal of 98139021 is 12093189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 98139021 - 2⁷ = 98138893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98139061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16356501 + ... + 16356506.

It is an arithmetic number, because the mean of its divisors is an integer number (32713008).

Almost surely, 2^98139021 is an apocalyptic number.

It is an amenable number.

98139021 is a deficient number, since it is larger than the sum of its proper divisors (32713011).

98139021 is a wasteful number, since it uses less digits than its factorization.

98139021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32713010.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 98139021 is about 9906.5140690356. The cubic root of 98139021 is about 461.2615355404.

The spelling of 98139021 in words is "ninety-eight million, one hundred thirty-nine thousand, twenty-one".