1047989 has 2 divisors, whose sum is σ = 1047990. Its totient is φ = 1047988.

The previous prime is 1047979. The next prime is 1047997. The reversal of 1047989 is 9897401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1020100 + 27889 = 1010^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 1047989 - 2¹⁶ = 982453 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1047929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523994 + 523995.

It is an arithmetic number, because the mean of its divisors is an integer number (523995).

2^1047989 is an apocalyptic number.

It is an amenable number.

1047989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047989 is an equidigital number, since it uses as much as digits as its factorization.

1047989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1047989 is about 1023.7133387819. The cubic root of 1047989 is about 101.5747061779.

The spelling of 1047989 in words is "one million, forty-seven thousand, nine hundred eighty-nine".