1389697 has 2 divisors, whose sum is σ = 1389698. Its totient is φ = 1389696.

The previous prime is 1389677. The next prime is 1389727. The reversal of 1389697 is 7969831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 53361 = 1156^2 + 231^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389697 - 2⁷ = 1389569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1389667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694848 + 694849.

It is an arithmetic number, because the mean of its divisors is an integer number (694849).

2^1389697 is an apocalyptic number.

It is an amenable number.

1389697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389697 is an equidigital number, since it uses as much as digits as its factorization.

1389697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 1389697 is about 1178.8541046287. The cubic root of 1389697 is about 111.5937931998.

The spelling of 1389697 in words is "one million, three hundred eighty-nine thousand, six hundred ninety-seven".