40303397903309 has 2 divisors, whose sum is σ = 40303397903310. Its totient is φ = 40303397903308.

The previous prime is 40303397903291. The next prime is 40303397903339. The reversal of 40303397903309 is 90330979330304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23583436013284 + 16719961890025 = 4856278^2 + 4089005^2 .

It is a cyclic number.

It is not a de Polignac number, because 40303397903309 - 2³² = 40299102936013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40303397903339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151698951654 + 20151698951655.

It is an arithmetic number, because the mean of its divisors is an integer number (20151698951655).

Almost surely, 2^{40303397903309} is an apocalyptic number.

It is an amenable number.

40303397903309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40303397903309 is an equidigital number, since it uses as much as digits as its factorization.

40303397903309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4960116, while the sum is 53.

The spelling of 40303397903309 in words is "forty trillion, three hundred three billion, three hundred ninety-seven million, nine hundred three thousand, three hundred nine".