1004999987 has 2 divisors, whose sum is σ = 1004999988. Its totient is φ = 1004999986.

The previous prime is 1004999971. The next prime is 1005000047. The reversal of 1004999987 is 7899994001.

It is a weak prime.

It is an emirp because it is prime and its reverse (7899994001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1004999987 - 2⁴ = 1004999971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1004999917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502499993 + 502499994.

It is an arithmetic number, because the mean of its divisors is an integer number (502499994).

Almost surely, 2^1004999987 is an apocalyptic number.

1004999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004999987 is an equidigital number, since it uses as much as digits as its factorization.

1004999987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 1004999987 is about 31701.7347632586. The cubic root of 1004999987 is about 1001.6638922604.

The spelling of 1004999987 in words is "one billion, four million, nine hundred ninety-nine thousand, nine hundred eighty-seven".