783138493 has 2 divisors, whose sum is σ = 783138494. Its totient is φ = 783138492.

The previous prime is 783138481. The next prime is 783138511. The reversal of 783138493 is 394831387.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 769396644 + 13741849 = 27738^2 + 3707^2 .

It is an emirp because it is prime and its reverse (394831387) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-783138493 is a prime.

It is a super-2 number, since 2×783138493² = 1226611798436622098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (783138413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391569246 + 391569247.

It is an arithmetic number, because the mean of its divisors is an integer number (391569247).

Almost surely, 2^783138493 is an apocalyptic number.

It is an amenable number.

783138493 is a deficient number, since it is larger than the sum of its proper divisors (1).

783138493 is an equidigital number, since it uses as much as digits as its factorization.

783138493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 783138493 is about 27984.6117178709. The cubic root of 783138493 is about 921.7493860570.

The spelling of 783138493 in words is "seven hundred eighty-three million, one hundred thirty-eight thousand, four hundred ninety-three".