98128447 has 4 divisors (see below), whose sum is σ = 98219320. Its totient is φ = 98037576.

The previous prime is 98128441. The next prime is 98128529. The reversal of 98128447 is 74482189.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98128447 is a prime.

It is a super-2 number, since 2×98128447² = 19258384221263618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98128441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43797 + ... + 45982.

It is an arithmetic number, because the mean of its divisors is an integer number (24554830).

Almost surely, 2^98128447 is an apocalyptic number.

98128447 is a deficient number, since it is larger than the sum of its proper divisors (90873).

98128447 is a wasteful number, since it uses less digits than its factorization.

98128447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90872.

The product of its digits is 129024, while the sum is 43.

The square root of 98128447 is about 9905.9803654156. The cubic root of 98128447 is about 461.2449687198.

The spelling of 98128447 in words is "ninety-eight million, one hundred twenty-eight thousand, four hundred forty-seven".