140326909 has 2 divisors, whose sum is σ = 140326910. Its totient is φ = 140326908.

The previous prime is 140326861. The next prime is 140326939. The reversal of 140326909 is 909623041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 23794884 = 10795^2 + 4878^2 .

It is an emirp because it is prime and its reverse (909623041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140326909 - 2¹⁷ = 140195837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140326939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70163454 + 70163455.

It is an arithmetic number, because the mean of its divisors is an integer number (70163455).

Almost surely, 2^140326909 is an apocalyptic number.

It is an amenable number.

140326909 is a deficient number, since it is larger than the sum of its proper divisors (1).

140326909 is an equidigital number, since it uses as much as digits as its factorization.

140326909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 140326909 is about 11845.9659378204. The cubic root of 140326909 is about 519.6532562635.

The spelling of 140326909 in words is "one hundred forty million, three hundred twenty-six thousand, nine hundred nine".