1691093 has 2 divisors, whose sum is σ = 1691094. Its totient is φ = 1691092.

The previous prime is 1691087. The next prime is 1691099. The reversal of 1691093 is 3901961.

It is a balanced prime because it is at equal distance from previous prime (1691087) and next prime (1691099).

It can be written as a sum of positive squares in only one way, i.e., 1495729 + 195364 = 1223^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 1691093 - 2¹⁸ = 1428949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1691099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845546 + 845547.

It is an arithmetic number, because the mean of its divisors is an integer number (845547).

2^1691093 is an apocalyptic number.

It is an amenable number.

1691093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691093 is an equidigital number, since it uses as much as digits as its factorization.

1691093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1691093 is about 1300.4203166669. The cubic root of 1691093 is about 119.1395157688.

The spelling of 1691093 in words is "one million, six hundred ninety-one thousand, ninety-three".