493432781 has 2 divisors, whose sum is σ = 493432782. Its totient is φ = 493432780.

The previous prime is 493432757. The next prime is 493432801. The reversal of 493432781 is 187234394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476548900 + 16883881 = 21830^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 493432781 - 2¹⁸ = 493170637 is a prime.

It is a super-2 number, since 2×493432781² = 486951818730787922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493432711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246716390 + 246716391.

It is an arithmetic number, because the mean of its divisors is an integer number (246716391).

Almost surely, 2^493432781 is an apocalyptic number.

It is an amenable number.

493432781 is a deficient number, since it is larger than the sum of its proper divisors (1).

493432781 is an equidigital number, since it uses as much as digits as its factorization.

493432781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 493432781 is about 22213.3469112604. The cubic root of 493432781 is about 790.2102634254.

The spelling of 493432781 in words is "four hundred ninety-three million, four hundred thirty-two thousand, seven hundred eighty-one".