400002313 has 4 divisors (see below), whose sum is σ = 400913920. Its totient is φ = 399090708.

The previous prime is 400002311. The next prime is 400002341. The reversal of 400002313 is 313200004.

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 400002313 - 2¹ = 400002311 is a prime.

It is a super-3 number, since 3×400002313³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400002293 and 400002302.

It is not an unprimeable number, because it can be changed into a prime (400002311) 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, 455145 + ... + 456022.

It is an arithmetic number, because the mean of its divisors is an integer number (100228480).

Almost surely, 2^400002313 is an apocalyptic number.

It is an amenable number.

400002313 is a deficient number, since it is larger than the sum of its proper divisors (911607).

400002313 is an equidigital number, since it uses as much as digits as its factorization.

400002313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911606.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400002313 is about 20000.0578249164. The cubic root of 400002313 is about 736.8077199195.

Adding to 400002313 its reverse (313200004), we get a palindrome (713202317).

The spelling of 400002313 in words is "four hundred million, two thousand, three hundred thirteen".