40039313 has 2 divisors, whose sum is σ = 40039314. Its totient is φ = 40039312.

The previous prime is 40039249. The next prime is 40039339. The reversal of 40039313 is 31393004.

40039313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37552384 + 2486929 = 6128^2 + 1577^2 .

It is a cyclic number.

It is not a de Polignac number, because 40039313 - 2⁶ = 40039249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40039393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20019656 + 20019657.

It is an arithmetic number, because the mean of its divisors is an integer number (20019657).

Almost surely, 2^40039313 is an apocalyptic number.

It is an amenable number.

40039313 is a deficient number, since it is larger than the sum of its proper divisors (1).

40039313 is an equidigital number, since it uses as much as digits as its factorization.

40039313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 40039313 is about 6327.6625226066. The cubic root of 40039313 is about 342.1071931240.

The spelling of 40039313 in words is "forty million, thirty-nine thousand, three hundred thirteen".