140038217309 has 2 divisors, whose sum is σ = 140038217310. Its totient is φ = 140038217308.

The previous prime is 140038217279. The next prime is 140038217311. The reversal of 140038217309 is 903712830041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140023394809 + 14822500 = 374197^2 + 3850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140038217309 is a prime.

It is a super-2 number, since 2×140038217309² (a number of 23 digits) contains 22 as substring.

Together with 140038217311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140038217399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70019108654 + 70019108655.

It is an arithmetic number, because the mean of its divisors is an integer number (70019108655).

Almost surely, 2^140038217309 is an apocalyptic number.

It is an amenable number.

140038217309 is a deficient number, since it is larger than the sum of its proper divisors (1).

140038217309 is an equidigital number, since it uses as much as digits as its factorization.

140038217309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 140038217309 in words is "one hundred forty billion, thirty-eight million, two hundred seventeen thousand, three hundred nine".