1689031 has 2 divisors, whose sum is σ = 1689032. Its totient is φ = 1689030.

The previous prime is 1688987. The next prime is 1689049. The reversal of 1689031 is 1309861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1689031 - 2⁷ = 1688903 is a prime.

It is a super-2 number, since 2×1689031² = 5705651437922, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₂₇₃₆₉ and since 1689031 and 127369 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1689071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844515 + 844516.

It is an arithmetic number, because the mean of its divisors is an integer number (844516).

2^1689031 is an apocalyptic number.

1689031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689031 is an equidigital number, since it uses as much as digits as its factorization.

1689031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1689031 is about 1299.6272542541. The cubic root of 1689031 is about 119.0910726222.

The spelling of 1689031 in words is "one million, six hundred eighty-nine thousand, thirty-one".