140020429 has 2 divisors, whose sum is σ = 140020430. Its totient is φ = 140020428.

The previous prime is 140020417. The next prime is 140020451. The reversal of 140020429 is 924020041.

It is an a-pointer prime, because the next prime (140020451) can be obtained adding 140020429 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93644329 + 46376100 = 9677^2 + 6810^2 .

It is a cyclic number.

It is not a de Polignac number, because 140020429 - 2¹³ = 140012237 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 (140020499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010214 + 70010215.

It is an arithmetic number, because the mean of its divisors is an integer number (70010215).

Almost surely, 2^140020429 is an apocalyptic number.

It is an amenable number.

140020429 is a deficient number, since it is larger than the sum of its proper divisors (1).

140020429 is an equidigital number, since it uses as much as digits as its factorization.

140020429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 140020429 is about 11833.0228175222. The cubic root of 140020429 is about 519.2746654953.

The spelling of 140020429 in words is "one hundred forty million, twenty thousand, four hundred twenty-nine".