98641891 has 2 divisors, whose sum is σ = 98641892. Its totient is φ = 98641890.

The previous prime is 98641883. The next prime is 98641903. The reversal of 98641891 is 19814689.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98641891 - 2³ = 98641883 is a prime.

It is not a weakly prime, because it can be changed into another prime (98641801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49320945 + 49320946.

It is an arithmetic number, because the mean of its divisors is an integer number (49320946).

Almost surely, 2^98641891 is an apocalyptic number.

98641891 is a deficient number, since it is larger than the sum of its proper divisors (1).

98641891 is an equidigital number, since it uses as much as digits as its factorization.

98641891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 46.

The square root of 98641891 is about 9931.8624134651. The cubic root of 98641891 is about 462.0480372706.

The spelling of 98641891 in words is "ninety-eight million, six hundred forty-one thousand, eight hundred ninety-one".