140820149 has 2 divisors, whose sum is σ = 140820150. Its totient is φ = 140820148.

The previous prime is 140820137. The next prime is 140820151. The reversal of 140820149 is 941028041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132940900 + 7879249 = 11530^2 + 2807^2 .

It is a cyclic number.

It is not a de Polignac number, because 140820149 - 2⁴ = 140820133 is a prime.

It is a Sophie Germain prime.

Together with 140820151, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140820179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70410074 + 70410075.

It is an arithmetic number, because the mean of its divisors is an integer number (70410075).

Almost surely, 2^140820149 is an apocalyptic number.

It is an amenable number.

140820149 is a deficient number, since it is larger than the sum of its proper divisors (1).

140820149 is an equidigital number, since it uses as much as digits as its factorization.

140820149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 140820149 is about 11866.7665772948. The cubic root of 140820149 is about 520.2613934821.

The spelling of 140820149 in words is "one hundred forty million, eight hundred twenty thousand, one hundred forty-nine".