98442091 has 8 divisors (see below), whose sum is σ = 108280368. Its totient is φ = 89491600.

The previous prime is 98442083. The next prime is 98442101. The reversal of 98442091 is 19024489.

It is a happy number.

It is not a de Polignac number, because 98442091 - 2³ = 98442083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 98442091.

It is not an unprimeable number, because it can be changed into a prime (98442011) 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 in 7 ways as a sum of consecutive naturals, for example, 35650 + ... + 38311.

It is an arithmetic number, because the mean of its divisors is an integer number (13535046).

Almost surely, 2^98442091 is an apocalyptic number.

98442091 is a deficient number, since it is larger than the sum of its proper divisors (9838277).

98442091 is an equidigital number, since it uses as much as digits as its factorization.

98442091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73994 (or 73972 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 98442091 is about 9921.7987784474. The cubic root of 98442091 is about 461.7358656469.

It can be divided in two parts, 9844 and 2091, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 98442091 in words is "ninety-eight million, four hundred forty-two thousand, ninety-one".