1802197 has 2 divisors, whose sum is σ = 1802198. Its totient is φ = 1802196.

The previous prime is 1802189. The next prime is 1802219. The reversal of 1802197 is 7912081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1347921 + 454276 = 1161^2 + 674^2 .

It is an emirp because it is prime and its reverse (7912081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1802197 - 2³ = 1802189 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1802107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901098 + 901099.

It is an arithmetic number, because the mean of its divisors is an integer number (901099).

2^1802197 is an apocalyptic number.

It is an amenable number.

1802197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1802197 is an equidigital number, since it uses as much as digits as its factorization.

1802197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1802197 is about 1342.4593103703. The cubic root of 1802197 is about 121.6935108925.

The spelling of 1802197 in words is "one million, eight hundred two thousand, one hundred ninety-seven".