1897573 has 2 divisors, whose sum is σ = 1897574. Its totient is φ = 1897572.

The previous prime is 1897561. The next prime is 1897583. The reversal of 1897573 is 3757981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1896129 + 1444 = 1377^2 + 38^2 .

It is an emirp because it is prime and its reverse (3757981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1897573 is a prime.

1897573 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948786 + 948787.

It is an arithmetic number, because the mean of its divisors is an integer number (948787).

2^1897573 is an apocalyptic number.

It is an amenable number.

1897573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897573 is an equidigital number, since it uses as much as digits as its factorization.

1897573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 1897573 is about 1377.5242284621. The cubic root of 1897573 is about 123.8034738121.

The spelling of 1897573 in words is "one million, eight hundred ninety-seven thousand, five hundred seventy-three".