1493397729 has 20 divisors (see below), whose sum is σ = 2231927280. Its totient is φ = 995130360.

The previous prime is 1493397727. The next prime is 1493397749. The reversal of 1493397729 is 9277933941.

It is not a de Polignac number, because 1493397729 - 2¹ = 1493397727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1493397727) 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 in 19 ways as a sum of consecutive naturals, for example, 300394 + ... + 305324.

It is an arithmetic number, because the mean of its divisors is an integer number (111596364).

Almost surely, 2^1493397729 is an apocalyptic number.

It is an amenable number.

1493397729 is a deficient number, since it is larger than the sum of its proper divisors (738529551).

1493397729 is an equidigital number, since it uses as much as digits as its factorization.

1493397729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682 (or 8673 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 1493397729 is about 38644.5045122848. The cubic root of 1493397729 is about 1143.0322804862.

The spelling of 1493397729 in words is "one billion, four hundred ninety-three million, three hundred ninety-seven thousand, seven hundred twenty-nine".