405342313 has 4 divisors (see below), whose sum is σ = 406333780. Its totient is φ = 404350848.

The previous prime is 405342307. The next prime is 405342341. The reversal of 405342313 is 313243504.

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 369677529 + 35664784 = 19227^2 + 5972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405342313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405342013) 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, 495120 + ... + 495937.

It is an arithmetic number, because the mean of its divisors is an integer number (101583445).

Almost surely, 2^405342313 is an apocalyptic number.

It is an amenable number.

405342313 is a deficient number, since it is larger than the sum of its proper divisors (991467).

405342313 is an equidigital number, since it uses as much as digits as its factorization.

405342313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991466.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 405342313 is about 20133.1148360108. The cubic root of 405342313 is about 740.0720121057.

Adding to 405342313 its reverse (313243504), we get a palindrome (718585817).

The spelling of 405342313 in words is "four hundred five million, three hundred forty-two thousand, three hundred thirteen".