6781048987 has 2 divisors, whose sum is σ = 6781048988. Its totient is φ = 6781048986.

The previous prime is 6781048943. The next prime is 6781048993. The reversal of 6781048987 is 7898401876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6781048987 - 2¹¹ = 6781046939 is a prime.

It is not a weakly prime, because it can be changed into another prime (6781048487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390524493 + 3390524494.

It is an arithmetic number, because the mean of its divisors is an integer number (3390524494).

Almost surely, 2^6781048987 is an apocalyptic number.

6781048987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6781048987 is an equidigital number, since it uses as much as digits as its factorization.

6781048987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The square root of 6781048987 is about 82347.1249467764. The cubic root of 6781048987 is about 1892.7748670040.

The spelling of 6781048987 in words is "six billion, seven hundred eighty-one million, forty-eight thousand, nine hundred eighty-seven".