98128831 has 2 divisors, whose sum is σ = 98128832. Its totient is φ = 98128830.

The previous prime is 98128817. The next prime is 98128841. The reversal of 98128831 is 13882189.

It is a strong prime.

It is an emirp because it is prime and its reverse (13882189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98128831 - 2¹¹ = 98126783 is a prime.

It is a super-2 number, since 2×98128831² = 19258534946853122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98128801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49064415 + 49064416.

It is an arithmetic number, because the mean of its divisors is an integer number (49064416).

Almost surely, 2^98128831 is an apocalyptic number.

98128831 is a deficient number, since it is larger than the sum of its proper divisors (1).

98128831 is an equidigital number, since it uses as much as digits as its factorization.

98128831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The square root of 98128831 is about 9905.9997476277. Note that the first 3 decimals coincide. The cubic root of 98128831 is about 461.2455703729.

The spelling of 98128831 in words is "ninety-eight million, one hundred twenty-eight thousand, eight hundred thirty-one".