140540069 has 2 divisors, whose sum is σ = 140540070. Its totient is φ = 140540068.

The previous prime is 140540063. The next prime is 140540117. The reversal of 140540069 is 960045041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102779044 + 37761025 = 10138^2 + 6145^2 .

It is an emirp because it is prime and its reverse (960045041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140540069 - 2¹² = 140535973 is a prime.

It is a super-2 number, since 2×140540069² = 39503021989049522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140540063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70270034 + 70270035.

It is an arithmetic number, because the mean of its divisors is an integer number (70270035).

Almost surely, 2^140540069 is an apocalyptic number.

It is an amenable number.

140540069 is a deficient number, since it is larger than the sum of its proper divisors (1).

140540069 is an equidigital number, since it uses as much as digits as its factorization.

140540069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 140540069 is about 11854.9596793916. The cubic root of 140540069 is about 519.9162451398.

The spelling of 140540069 in words is "one hundred forty million, five hundred forty thousand, sixty-nine".