1002409987 has 2 divisors, whose sum is σ = 1002409988. Its totient is φ = 1002409986.

The previous prime is 1002409979. The next prime is 1002409997. The reversal of 1002409987 is 7899042001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002409987 - 2³ = 1002409979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002409997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501204993 + 501204994.

It is an arithmetic number, because the mean of its divisors is an integer number (501204994).

Almost surely, 2^1002409987 is an apocalyptic number.

1002409987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002409987 is an equidigital number, since it uses as much as digits as its factorization.

1002409987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1002409987 is about 31660.8589112803. The cubic root of 1002409987 is about 1000.8026845252.

The spelling of 1002409987 in words is "one billion, two million, four hundred nine thousand, nine hundred eighty-seven".