1689377 has 2 divisors, whose sum is σ = 1689378. Its totient is φ = 1689376.

The previous prime is 1689367. The next prime is 1689379. The reversal of 1689377 is 7739861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 414736 = 1129^2 + 644^2 .

It is a cyclic number.

It is not a de Polignac number, because 1689377 - 2¹⁸ = 1427233 is a prime.

Together with 1689379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1689379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844688 + 844689.

It is an arithmetic number, because the mean of its divisors is an integer number (844689).

2^1689377 is an apocalyptic number.

It is an amenable number.

1689377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689377 is an equidigital number, since it uses as much as digits as its factorization.

1689377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 1689377 is about 1299.7603625284. The cubic root of 1689377 is about 119.0992040493.

The spelling of 1689377 in words is "one million, six hundred eighty-nine thousand, three hundred seventy-seven".