405020063 has 4 divisors (see below), whose sum is σ = 462880080. Its totient is φ = 347160048.

The previous prime is 405020047. The next prime is 405020071. The reversal of 405020063 is 360020504.

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

It is a cyclic number.

It is not a de Polignac number, because 405020063 - 2⁴ = 405020047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405020023) 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, 28929998 + ... + 28930011.

It is an arithmetic number, because the mean of its divisors is an integer number (115720020).

Almost surely, 2^405020063 is an apocalyptic number.

405020063 is a deficient number, since it is larger than the sum of its proper divisors (57860017).

405020063 is an equidigital number, since it uses as much as digits as its factorization.

405020063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57860016.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 405020063 is about 20125.1102605675. The cubic root of 405020063 is about 739.8758392858.

Adding to 405020063 its reverse (360020504), we get a palindrome (765040567).

The spelling of 405020063 in words is "four hundred five million, twenty thousand, sixty-three".