98778841 has 4 divisors (see below), whose sum is σ = 112890112. Its totient is φ = 84667572.

The previous prime is 98778839. The next prime is 98778851. The reversal of 98778841 is 14887789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14887789 = 7 ⋅2126827.

It is a cyclic number.

It is not a de Polignac number, because 98778841 - 2¹ = 98778839 is a prime.

It is a super-3 number, since 3×98778841³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98778851) 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 3 ways as a sum of consecutive naturals, for example, 7055625 + ... + 7055638.

It is an arithmetic number, because the mean of its divisors is an integer number (28222528).

Almost surely, 2^98778841 is an apocalyptic number.

It is an amenable number.

98778841 is a deficient number, since it is larger than the sum of its proper divisors (14111271).

98778841 is a wasteful number, since it uses less digits than its factorization.

98778841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14111270.

The product of its digits is 903168, while the sum is 52.

The square root of 98778841 is about 9938.7544994330. The cubic root of 98778841 is about 462.2617673494.

The spelling of 98778841 in words is "ninety-eight million, seven hundred seventy-eight thousand, eight hundred forty-one".