1283238493 has 2 divisors, whose sum is σ = 1283238494. Its totient is φ = 1283238492.

The previous prime is 1283238433. The next prime is 1283238503. The reversal of 1283238493 is 3948323821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143927684 + 139310809 = 33822^2 + 11803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1283238493 - 2⁹ = 1283237981 is a prime.

It is a super-2 number, since 2×1283238493² = 3293402059833822098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1283238433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641619246 + 641619247.

It is an arithmetic number, because the mean of its divisors is an integer number (641619247).

Almost surely, 2^1283238493 is an apocalyptic number.

It is an amenable number.

1283238493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283238493 is an equidigital number, since it uses as much as digits as its factorization.

1283238493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 43.

The square root of 1283238493 is about 35822.3183643940. The cubic root of 1283238493 is about 1086.6819653063.

The spelling of 1283238493 in words is "one billion, two hundred eighty-three million, two hundred thirty-eight thousand, four hundred ninety-three".