1000456889 has 2 divisors, whose sum is σ = 1000456890. Its totient is φ = 1000456888.

The previous prime is 1000456859. The next prime is 1000456937. The reversal of 1000456889 is 9886540001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 904024489 + 96432400 = 30067^2 + 9820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000456889 - 2²⁰ = 999408313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000456859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500228444 + 500228445.

It is an arithmetic number, because the mean of its divisors is an integer number (500228445).

Almost surely, 2^1000456889 is an apocalyptic number.

It is an amenable number.

1000456889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000456889 is an equidigital number, since it uses as much as digits as its factorization.

1000456889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 1000456889 is about 31629.9998261144. Note that the first 3 decimals coincide. The cubic root of 1000456889 is about 1000.1522731450.

The spelling of 1000456889 in words is "one billion, four hundred fifty-six thousand, eight hundred eighty-nine".