1347989 has 2 divisors, whose sum is σ = 1347990. Its totient is φ = 1347988.

The previous prime is 1347971. The next prime is 1348001. The reversal of 1347989 is 9897431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067089 + 280900 = 1033^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347989 - 2⁸ = 1347733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1347919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673994 + 673995.

It is an arithmetic number, because the mean of its divisors is an integer number (673995).

2^1347989 is an apocalyptic number.

It is an amenable number.

1347989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1347989 is an equidigital number, since it uses as much as digits as its factorization.

1347989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 1347989 is about 1161.0292847297. The cubic root of 1347989 is about 110.4660392624.

The spelling of 1347989 in words is "one million, three hundred forty-seven thousand, nine hundred eighty-nine".