1493334721 has 2 divisors, whose sum is σ = 1493334722. Its totient is φ = 1493334720.

The previous prime is 1493334643. The next prime is 1493334727. The reversal of 1493334721 is 1274333941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1364194225 + 129140496 = 36935^2 + 11364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493334721 - 2¹⁹ = 1492810433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1493334727) 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, 746667360 + 746667361.

It is an arithmetic number, because the mean of its divisors is an integer number (746667361).

Almost surely, 2^1493334721 is an apocalyptic number.

It is an amenable number.

1493334721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493334721 is an equidigital number, since it uses as much as digits as its factorization.

1493334721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 1493334721 is about 38643.6892778109. The cubic root of 1493334721 is about 1143.0162050208.

The spelling of 1493334721 in words is "one billion, four hundred ninety-three million, three hundred thirty-four thousand, seven hundred twenty-one".