1974493 has 2 divisors, whose sum is σ = 1974494. Its totient is φ = 1974492.

The previous prime is 1974457. The next prime is 1974503. The reversal of 1974493 is 3944791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1968409 + 6084 = 1403^2 + 78^2 .

It is an emirp because it is prime and its reverse (3944791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1974493 - 2¹³ = 1966301 is a prime.

1974493 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987246 + 987247.

It is an arithmetic number, because the mean of its divisors is an integer number (987247).

2^1974493 is an apocalyptic number.

It is an amenable number.

1974493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974493 is an equidigital number, since it uses as much as digits as its factorization.

1974493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 1974493 is about 1405.1665381726. The cubic root of 1974493 is about 125.4541982990.

The spelling of 1974493 in words is "one million, nine hundred seventy-four thousand, four hundred ninety-three".