1660229 has 2 divisors, whose sum is σ = 1660230. Its totient is φ = 1660228.

The previous prime is 1660207. The next prime is 1660231. The reversal of 1660229 is 9220661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 664225 = 998^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660229 - 2¹⁶ = 1594693 is a prime.

Together with 1660231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660198 and 1660207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830114 + 830115.

It is an arithmetic number, because the mean of its divisors is an integer number (830115).

2^1660229 is an apocalyptic number.

It is an amenable number.

1660229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660229 is an equidigital number, since it uses as much as digits as its factorization.

1660229 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 26.

The square root of 1660229 is about 1288.4987388430. The cubic root of 1660229 is about 118.4102592233.

The spelling of 1660229 in words is "one million, six hundred sixty thousand, two hundred twenty-nine".