1210009987 has 2 divisors, whose sum is σ = 1210009988. Its totient is φ = 1210009986.

The previous prime is 1210009973. The next prime is 1210010027. The reversal of 1210009987 is 7899000121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210009987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210001987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605004993 + 605004994.

It is an arithmetic number, because the mean of its divisors is an integer number (605004994).

Almost surely, 2^1210009987 is an apocalyptic number.

1210009987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210009987 is an equidigital number, since it uses as much as digits as its factorization.

1210009987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 1210009987 is about 34785.1978145877. The cubic root of 1210009987 is about 1065.6051684857.

The spelling of 1210009987 in words is "one billion, two hundred ten million, nine thousand, nine hundred eighty-seven".