98940091 has 2 divisors, whose sum is σ = 98940092. Its totient is φ = 98940090.

The previous prime is 98940073. The next prime is 98940103. The reversal of 98940091 is 19004989.

It is a strong prime.

It is an emirp because it is prime and its reverse (19004989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98940091 - 2⁵ = 98940059 is a prime.

It is not a weakly prime, because it can be changed into another prime (98940001) 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 as a sum of consecutive naturals, namely, 49470045 + 49470046.

It is an arithmetic number, because the mean of its divisors is an integer number (49470046).

Almost surely, 2^98940091 is an apocalyptic number.

98940091 is a deficient number, since it is larger than the sum of its proper divisors (1).

98940091 is an equidigital number, since it uses as much as digits as its factorization.

98940091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 98940091 is about 9946.8633749539. The cubic root of 98940091 is about 462.5131679718.

It can be divided in two parts, 9 and 8940091, that added together give a square (8940100 = 2990²).

The spelling of 98940091 in words is "ninety-eight million, nine hundred forty thousand, ninety-one".