40010309 has 2 divisors, whose sum is σ = 40010310. Its totient is φ = 40010308.

The previous prime is 40010291. The next prime is 40010353. The reversal of 40010309 is 90301004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22829284 + 17181025 = 4778^2 + 4145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40010309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40010359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005154 + 20005155.

It is an arithmetic number, because the mean of its divisors is an integer number (20005155).

Almost surely, 2^40010309 is an apocalyptic number.

It is an amenable number.

40010309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40010309 is an equidigital number, since it uses as much as digits as its factorization.

40010309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 40010309 is about 6325.3702658422. The cubic root of 40010309 is about 342.0245670484.

The spelling of 40010309 in words is "forty million, ten thousand, three hundred nine".