140135115209 has 2 divisors, whose sum is σ = 140135115210. Its totient is φ = 140135115208.

The previous prime is 140135115203. The next prime is 140135115247. The reversal of 140135115209 is 902511531041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99822506809 + 40312608400 = 315947^2 + 200780^2 .

It is an emirp because it is prime and its reverse (902511531041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140135115209 is a prime.

It is a super-2 number, since 2×140135115209² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (140135115203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70067557604 + 70067557605.

It is an arithmetic number, because the mean of its divisors is an integer number (70067557605).

Almost surely, 2^140135115209 is an apocalyptic number.

It is an amenable number.

140135115209 is a deficient number, since it is larger than the sum of its proper divisors (1).

140135115209 is an equidigital number, since it uses as much as digits as its factorization.

140135115209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 140135115209 in words is "one hundred forty billion, one hundred thirty-five million, one hundred fifteen thousand, two hundred nine".