1017481987 has 2 divisors, whose sum is σ = 1017481988. Its totient is φ = 1017481986.

The previous prime is 1017481961. The next prime is 1017481999. The reversal of 1017481987 is 7891847101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1017481987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1017421987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508740993 + 508740994.

It is an arithmetic number, because the mean of its divisors is an integer number (508740994).

Almost surely, 2^1017481987 is an apocalyptic number.

1017481987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017481987 is an equidigital number, since it uses as much as digits as its factorization.

1017481987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 46.

The square root of 1017481987 is about 31897.9934635394. The cubic root of 1017481987 is about 1005.7936972467.

The spelling of 1017481987 in words is "one billion, seventeen million, four hundred eighty-one thousand, nine hundred eighty-seven".