1897229 has 2 divisors, whose sum is σ = 1897230. Its totient is φ = 1897228.

The previous prime is 1897219. The next prime is 1897237. The reversal of 1897229 is 9227981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1885129 + 12100 = 1373^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897229 - 2¹⁶ = 1831693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1897192 and 1897201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948614 + 948615.

It is an arithmetic number, because the mean of its divisors is an integer number (948615).

2^1897229 is an apocalyptic number.

It is an amenable number.

1897229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897229 is an equidigital number, since it uses as much as digits as its factorization.

1897229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 1897229 is about 1377.3993611150. The cubic root of 1897229 is about 123.7959921555.

The spelling of 1897229 in words is "one million, eight hundred ninety-seven thousand, two hundred twenty-nine".