40839013 has 2 divisors, whose sum is σ = 40839014. Its totient is φ = 40839012.

The previous prime is 40838983. The next prime is 40839023. The reversal of 40839013 is 31093804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31730689 + 9108324 = 5633^2 + 3018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40839013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40839023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20419506 + 20419507.

It is an arithmetic number, because the mean of its divisors is an integer number (20419507).

Almost surely, 2^40839013 is an apocalyptic number.

It is an amenable number.

40839013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40839013 is an equidigital number, since it uses as much as digits as its factorization.

40839013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40839013 is about 6390.5409004246. The cubic root of 40839013 is about 344.3698164795.

The spelling of 40839013 in words is "forty million, eight hundred thirty-nine thousand, thirteen".