742239493 has 2 divisors, whose sum is σ = 742239494. Its totient is φ = 742239492.

The previous prime is 742239473. The next prime is 742239497. The reversal of 742239493 is 394932247.

742239493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387971809 + 354267684 = 19697^2 + 18822^2 .

It is an emirp because it is prime and its reverse (394932247) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742239493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742239497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371119746 + 371119747.

It is an arithmetic number, because the mean of its divisors is an integer number (371119747).

Almost surely, 2^742239493 is an apocalyptic number.

It is an amenable number.

742239493 is a deficient number, since it is larger than the sum of its proper divisors (1).

742239493 is an equidigital number, since it uses as much as digits as its factorization.

742239493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 43.

The square root of 742239493 is about 27244.0726213979. The cubic root of 742239493 is about 905.4156970240.

The spelling of 742239493 in words is "seven hundred forty-two million, two hundred thirty-nine thousand, four hundred ninety-three".