405132493 has 2 divisors, whose sum is σ = 405132494. Its totient is φ = 405132492.

The previous prime is 405132479. The next prime is 405132503. The reversal of 405132493 is 394231504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279625284 + 125507209 = 16722^2 + 11203^2 .

It is a cyclic number.

It is not a de Polignac number, because 405132493 - 2¹³ = 405124301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405132463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202566246 + 202566247.

It is an arithmetic number, because the mean of its divisors is an integer number (202566247).

Almost surely, 2^405132493 is an apocalyptic number.

It is an amenable number.

405132493 is a deficient number, since it is larger than the sum of its proper divisors (1).

405132493 is an equidigital number, since it uses as much as digits as its factorization.

405132493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 405132493 is about 20127.9033433689. The cubic root of 405132493 is about 739.9442939561.

Adding to 405132493 its reverse (394231504), we get a palindrome (799363997).

The spelling of 405132493 in words is "four hundred five million, one hundred thirty-two thousand, four hundred ninety-three".