405343493 has 2 divisors, whose sum is σ = 405343494. Its totient is φ = 405343492.

The previous prime is 405343489. The next prime is 405343537. The reversal of 405343493 is 394343504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272679169 + 132664324 = 16513^2 + 11518^2 .

It is a cyclic number.

It is not a de Polignac number, because 405343493 - 2² = 405343489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405343483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202671746 + 202671747.

It is an arithmetic number, because the mean of its divisors is an integer number (202671747).

Almost surely, 2^405343493 is an apocalyptic number.

It is an amenable number.

405343493 is a deficient number, since it is larger than the sum of its proper divisors (1).

405343493 is an equidigital number, since it uses as much as digits as its factorization.

405343493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 405343493 is about 20133.1441409433. The cubic root of 405343493 is about 740.0727302511.

Adding to 405343493 its reverse (394343504), we get a palindrome (799686997).

The spelling of 405343493 in words is "four hundred five million, three hundred forty-three thousand, four hundred ninety-three".