140154109 has 2 divisors, whose sum is σ = 140154110. Its totient is φ = 140154108.

The previous prime is 140154107. The next prime is 140154121. The reversal of 140154109 is 901451041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 205209 = 11830^2 + 453^2 .

It is a cyclic number.

It is not a de Polignac number, because 140154109 - 2¹ = 140154107 is a prime.

Together with 140154107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140154107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70077054 + 70077055.

It is an arithmetic number, because the mean of its divisors is an integer number (70077055).

Almost surely, 2^140154109 is an apocalyptic number.

It is an amenable number.

140154109 is a deficient number, since it is larger than the sum of its proper divisors (1).

140154109 is an equidigital number, since it uses as much as digits as its factorization.

140154109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 140154109 is about 11838.6700688887. The cubic root of 140154109 is about 519.4398665268.

The spelling of 140154109 in words is "one hundred forty million, one hundred fifty-four thousand, one hundred nine".