140400109 has 2 divisors, whose sum is σ = 140400110. Its totient is φ = 140400108.

The previous prime is 140400103. The next prime is 140400121. The reversal of 140400109 is 901004041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92582884 + 47817225 = 9622^2 + 6915^2 .

It is a cyclic number.

It is not a de Polignac number, because 140400109 - 2⁵ = 140400077 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 (140400103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70200054 + 70200055.

It is an arithmetic number, because the mean of its divisors is an integer number (70200055).

Almost surely, 2^140400109 is an apocalyptic number.

It is an amenable number.

140400109 is a deficient number, since it is larger than the sum of its proper divisors (1).

140400109 is an equidigital number, since it uses as much as digits as its factorization.

140400109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 140400109 is about 11849.0551944026. The cubic root of 140400109 is about 519.7435977060.

The spelling of 140400109 in words is "one hundred forty million, four hundred thousand, one hundred nine".