40869013 has 2 divisors, whose sum is σ = 40869014. Its totient is φ = 40869012.

The previous prime is 40869011. The next prime is 40869043. The reversal of 40869013 is 31096804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 1656369 = 6262^2 + 1287^2 .

It is a cyclic number.

It is not a de Polignac number, because 40869013 - 2¹ = 40869011 is a prime.

Together with 40869011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40869011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20434506 + 20434507.

It is an arithmetic number, because the mean of its divisors is an integer number (20434507).

Almost surely, 2^40869013 is an apocalyptic number.

It is an amenable number.

40869013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40869013 is an equidigital number, since it uses as much as digits as its factorization.

40869013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40869013 is about 6392.8876886740. The cubic root of 40869013 is about 344.4541195764.

The spelling of 40869013 in words is "forty million, eight hundred sixty-nine thousand, thirteen".