8978203811 has 4 divisors (see below), whose sum is σ = 9169229472. Its totient is φ = 8787178152.

The previous prime is 8978203799. The next prime is 8978203841. The reversal of 8978203811 is 1183028798.

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

It is a cyclic number.

It is not a de Polignac number, because 8978203811 - 2²² = 8974009507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 191025613 = 8978203811 / (8 + 9 + 7 + 8 + 2 + 0 + 3 + 8 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8978203841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95512760 + ... + 95512853.

It is an arithmetic number, because the mean of its divisors is an integer number (2292307368).

Almost surely, 2^8978203811 is an apocalyptic number.

8978203811 is a deficient number, since it is larger than the sum of its proper divisors (191025661).

8978203811 is a wasteful number, since it uses less digits than its factorization.

8978203811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191025660.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 8978203811 is about 94753.3841664771. The cubic root of 8978203811 is about 2078.4032841918.

The spelling of 8978203811 in words is "eight billion, nine hundred seventy-eight million, two hundred three thousand, eight hundred eleven".