1791973 has 2 divisors, whose sum is σ = 1791974. Its totient is φ = 1791972.

The previous prime is 1791967. The next prime is 1791989. The reversal of 1791973 is 3791971.

It is the 547-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014049 + 777924 = 1007^2 + 882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791973 - 2⁵ = 1791941 is a prime.

It is a super-2 number, since 2×1791973² = 6422334465458, which contains 22 as substring.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1791943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895986 + 895987.

It is an arithmetic number, because the mean of its divisors is an integer number (895987).

2^1791973 is an apocalyptic number.

It is an amenable number.

1791973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791973 is an equidigital number, since it uses as much as digits as its factorization.

1791973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907, while the sum is 37.

The square root of 1791973 is about 1338.6459576751. The cubic root of 1791973 is about 121.4629488429.

The spelling of 1791973 in words is "one million, seven hundred ninety-one thousand, nine hundred seventy-three".