978049841 has 4 divisors (see below), whose sum is σ = 978112884. Its totient is φ = 977986800.

The previous prime is 978049829. The next prime is 978049847. The reversal of 978049841 is 148940879.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 773674225 + 204375616 = 27815^2 + 14296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978049841 is a prime.

It is a deceptive number, since it divides R_978049840.

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 978049841.

It is not an unprimeable number, because it can be changed into a prime (978049847) 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, 9851 + ... + 45311.

It is an arithmetic number, because the mean of its divisors is an integer number (244528221).

Almost surely, 2^978049841 is an apocalyptic number.

It is an amenable number.

978049841 is a deficient number, since it is larger than the sum of its proper divisors (63043).

978049841 is a wasteful number, since it uses less digits than its factorization.

978049841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63042.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 978049841 is about 31273.7884017910. The cubic root of 978049841 is about 992.6290834103.

The spelling of 978049841 in words is "nine hundred seventy-eight million, forty-nine thousand, eight hundred forty-one".