1692989 has 2 divisors, whose sum is σ = 1692990. Its totient is φ = 1692988.

The previous prime is 1692983. The next prime is 1693001. The reversal of 1692989 is 9892961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 80089 = 1270^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 1692989 - 2¹² = 1688893 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1692983) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 846494 + 846495.

It is an arithmetic number, because the mean of its divisors is an integer number (846495).

2^1692989 is an apocalyptic number.

It is an amenable number.

1692989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1692989 is an equidigital number, since it uses as much as digits as its factorization.

1692989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 1692989 is about 1301.1491075200. The cubic root of 1692989 is about 119.1840242917.

The spelling of 1692989 in words is "one million, six hundred ninety-two thousand, nine hundred eighty-nine".