1927993 has 2 divisors, whose sum is σ = 1927994. Its totient is φ = 1927992.

The previous prime is 1927979. The next prime is 1927997. The reversal of 1927993 is 3997291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1817104 + 110889 = 1348^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 1927993 - 2⁹ = 1927481 is a prime.

1927993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1927997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963996 + 963997.

It is an arithmetic number, because the mean of its divisors is an integer number (963997).

2^1927993 is an apocalyptic number.

It is an amenable number.

1927993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1927993 is an equidigital number, since it uses as much as digits as its factorization.

1927993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 40.

The square root of 1927993 is about 1388.5218759530. The cubic root of 1927993 is about 124.4615344360.

The spelling of 1927993 in words is "one million, nine hundred twenty-seven thousand, nine hundred ninety-three".