405536393 has 4 divisors (see below), whose sum is σ = 407880708. Its totient is φ = 403192080.

The previous prime is 405536387. The next prime is 405536401. The reversal of 405536393 is 393635504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 300432889 + 105103504 = 17333^2 + 10252^2 .

It is a cyclic number.

It is not a de Polignac number, because 405536393 - 2⁸ = 405536137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405536333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171898 + ... + 1172243.

It is an arithmetic number, because the mean of its divisors is an integer number (101970177).

Almost surely, 2^405536393 is an apocalyptic number.

It is an amenable number.

405536393 is a deficient number, since it is larger than the sum of its proper divisors (2344315).

405536393 is a wasteful number, since it uses less digits than its factorization.

405536393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344314.

The product of its (nonzero) digits is 145800, while the sum is 38.

The square root of 405536393 is about 20137.9341790562. The cubic root of 405536393 is about 740.1901100306.

The spelling of 405536393 in words is "four hundred five million, five hundred thirty-six thousand, three hundred ninety-three".