40403513 has 2 divisors, whose sum is σ = 40403514. Its totient is φ = 40403512.

The previous prime is 40403483. The next prime is 40403527. The reversal of 40403513 is 31530404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28761769 + 11641744 = 5363^2 + 3412^2 .

It is a cyclic number.

It is not a de Polignac number, because 40403513 - 2⁶ = 40403449 is a prime.

It is not a weakly prime, because it can be changed into another prime (40403563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20201756 + 20201757.

It is an arithmetic number, because the mean of its divisors is an integer number (20201757).

Almost surely, 2^40403513 is an apocalyptic number.

It is an amenable number.

40403513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40403513 is an equidigital number, since it uses as much as digits as its factorization.

40403513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40403513 is about 6356.3757755501. The cubic root of 40403513 is about 343.1413397505.

Adding to 40403513 its reverse (31530404), we get a palindrome (71933917).

The spelling of 40403513 in words is "forty million, four hundred three thousand, five hundred thirteen".