1489884857 has 2 divisors, whose sum is σ = 1489884858. Its totient is φ = 1489884856.

The previous prime is 1489884833. The next prime is 1489884859. The reversal of 1489884857 is 7584889841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254293056 + 235591801 = 35416^2 + 15349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1489884857 - 2⁶ = 1489884793 is a prime.

Together with 1489884859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1489884857.

It is not a weakly prime, because it can be changed into another prime (1489884859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744942428 + 744942429.

It is an arithmetic number, because the mean of its divisors is an integer number (744942429).

Almost surely, 2^1489884857 is an apocalyptic number.

It is an amenable number.

1489884857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1489884857 is an equidigital number, since it uses as much as digits as its factorization.

1489884857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20643840, while the sum is 62.

The square root of 1489884857 is about 38599.0266328051. The cubic root of 1489884857 is about 1142.1353373365.

The spelling of 1489884857 in words is "one billion, four hundred eighty-nine million, eight hundred eighty-four thousand, eight hundred fifty-seven".