40005313 has 2 divisors, whose sum is σ = 40005314. Its totient is φ = 40005312.

The previous prime is 40005311. The next prime is 40005331. The reversal of 40005313 is 31350004.

Together with next prime (40005331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31899904 + 8105409 = 5648^2 + 2847^2 .

It is a cyclic number.

It is not a de Polignac number, because 40005313 - 2¹ = 40005311 is a prime.

Together with 40005311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40005311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002656 + 20002657.

It is an arithmetic number, because the mean of its divisors is an integer number (20002657).

Almost surely, 2^40005313 is an apocalyptic number.

It is an amenable number.

40005313 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005313 is an equidigital number, since it uses as much as digits as its factorization.

40005313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 40005313 is about 6324.9753359203. The cubic root of 40005313 is about 342.0103305020.

Adding to 40005313 its reverse (31350004), we get a palindrome (71355317).

The spelling of 40005313 in words is "forty million, five thousand, three hundred thirteen".