405345613 has 4 divisors (see below), whose sum is σ = 405555328. Its totient is φ = 405135900.

The previous prime is 405345581. The next prime is 405345617. The reversal of 405345613 is 316543504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405345613 - 2⁵ = 405345581 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 (405345617) 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, 101931 + ... + 105832.

It is an arithmetic number, because the mean of its divisors is an integer number (101388832).

Almost surely, 2^405345613 is an apocalyptic number.

It is an amenable number.

405345613 is a deficient number, since it is larger than the sum of its proper divisors (209715).

405345613 is a wasteful number, since it uses less digits than its factorization.

405345613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209714.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 405345613 is about 20133.1967903758. The cubic root of 405345613 is about 740.0740204749.

The spelling of 405345613 in words is "four hundred five million, three hundred forty-five thousand, six hundred thirteen".