40939013 has 2 divisors, whose sum is σ = 40939014. Its totient is φ = 40939012.

The previous prime is 40938973. The next prime is 40939051. The reversal of 40939013 is 31093904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37724164 + 3214849 = 6142^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 40939013 - 2²⁰ = 39890437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40938013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20469506 + 20469507.

It is an arithmetic number, because the mean of its divisors is an integer number (20469507).

Almost surely, 2^40939013 is an apocalyptic number.

It is an amenable number.

40939013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40939013 is an equidigital number, since it uses as much as digits as its factorization.

40939013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 40939013 is about 6398.3601805463. The cubic root of 40939013 is about 344.6506664918.

It can be divided in two parts, 4093901 and 3, that added together give a palindrome (4093904).

The spelling of 40939013 in words is "forty million, nine hundred thirty-nine thousand, thirteen".