1016671987 has 2 divisors, whose sum is σ = 1016671988. Its totient is φ = 1016671986.

The previous prime is 1016671973. The next prime is 1016672089. The reversal of 1016671987 is 7891766101.

It is a weak prime.

It is an emirp because it is prime and its reverse (7891766101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1016671987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1016678987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508335993 + 508335994.

It is an arithmetic number, because the mean of its divisors is an integer number (508335994).

Almost surely, 2^1016671987 is an apocalyptic number.

1016671987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016671987 is an equidigital number, since it uses as much as digits as its factorization.

1016671987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 1016671987 is about 31885.2942122227. The cubic root of 1016671987 is about 1005.5267280067.

The spelling of 1016671987 in words is "one billion, sixteen million, six hundred seventy-one thousand, nine hundred eighty-seven".