1493813 has 2 divisors, whose sum is σ = 1493814. Its totient is φ = 1493812.

The previous prime is 1493783. The next prime is 1493839. The reversal of 1493813 is 3183941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1493284 + 529 = 1222^2 + 23^2 .

It is an emirp because it is prime and its reverse (3183941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1493813 - 2⁶ = 1493749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746906 + 746907.

It is an arithmetic number, because the mean of its divisors is an integer number (746907).

2^1493813 is an apocalyptic number.

It is an amenable number.

1493813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493813 is an equidigital number, since it uses as much as digits as its factorization.

1493813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1493813 is about 1222.2164292792. The cubic root of 1493813 is about 114.3138218813.

The spelling of 1493813 in words is "one million, four hundred ninety-three thousand, eight hundred thirteen".