1020449987 has 2 divisors, whose sum is σ = 1020449988. Its totient is φ = 1020449986.

The previous prime is 1020449981. The next prime is 1020450019. The reversal of 1020449987 is 7899440201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020449987 - 2⁶ = 1020449923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020449981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510224993 + 510224994.

It is an arithmetic number, because the mean of its divisors is an integer number (510224994).

Almost surely, 2^1020449987 is an apocalyptic number.

1020449987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020449987 is an equidigital number, since it uses as much as digits as its factorization.

1020449987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1020449987 is about 31944.4828882860. The cubic root of 1020449987 is about 1006.7707162721.

The spelling of 1020449987 in words is "one billion, twenty million, four hundred forty-nine thousand, nine hundred eighty-seven".