140257109 has 2 divisors, whose sum is σ = 140257110. Its totient is φ = 140257108.

The previous prime is 140257097. The next prime is 140257129. The reversal of 140257109 is 901752041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110040100 + 30217009 = 10490^2 + 5497^2 .

It is a cyclic number.

It is not a de Polignac number, because 140257109 - 2⁴ = 140257093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140257129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70128554 + 70128555.

It is an arithmetic number, because the mean of its divisors is an integer number (70128555).

Almost surely, 2^140257109 is an apocalyptic number.

It is an amenable number.

140257109 is a deficient number, since it is larger than the sum of its proper divisors (1).

140257109 is an equidigital number, since it uses as much as digits as its factorization.

140257109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 140257109 is about 11843.0194207390. The cubic root of 140257109 is about 519.5670817415.

The spelling of 140257109 in words is "one hundred forty million, two hundred fifty-seven thousand, one hundred nine".