98179891 has 2 divisors, whose sum is σ = 98179892. Its totient is φ = 98179890.

The previous prime is 98179867. The next prime is 98179931. The reversal of 98179891 is 19897189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98179891 - 2¹⁹ = 97655603 is a prime.

It is not a weakly prime, because it can be changed into another prime (98179831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49089945 + 49089946.

It is an arithmetic number, because the mean of its divisors is an integer number (49089946).

Almost surely, 2^98179891 is an apocalyptic number.

98179891 is a deficient number, since it is larger than the sum of its proper divisors (1).

98179891 is an equidigital number, since it uses as much as digits as its factorization.

98179891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 52.

The square root of 98179891 is about 9908.5766384481. The cubic root of 98179891 is about 461.3255574501.

The spelling of 98179891 in words is "ninety-eight million, one hundred seventy-nine thousand, eight hundred ninety-one".