978101879 has 4 divisors (see below), whose sum is σ = 1011829560. Its totient is φ = 944374200.

The previous prime is 978101857. The next prime is 978101903.

978101879 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978101879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978101849) 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, 16863797 + ... + 16863854.

It is an arithmetic number, because the mean of its divisors is an integer number (252957390).

Almost surely, 2^978101879 is an apocalyptic number.

978101879 is a deficient number, since it is larger than the sum of its proper divisors (33727681).

978101879 is a wasteful number, since it uses less digits than its factorization.

978101879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33727680.

The product of its (nonzero) digits is 254016, while the sum is 50.

The square root of 978101879 is about 31274.6203654017. The cubic root of 978101879 is about 992.6466876652.

The spelling of 978101879 in words is "nine hundred seventy-eight million, one hundred one thousand, eight hundred seventy-nine".