140020061 has 2 divisors, whose sum is σ = 140020062. Its totient is φ = 140020060.

The previous prime is 140019967. The next prime is 140020081. The reversal of 140020061 is 160020041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 38514436 = 10075^2 + 6206^2 .

It is an emirp because it is prime and its reverse (160020041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140020061 - 2²² = 135825757 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 (140020081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010030 + 70010031.

It is an arithmetic number, because the mean of its divisors is an integer number (70010031).

Almost surely, 2^140020061 is an apocalyptic number.

It is an amenable number.

140020061 is a deficient number, since it is larger than the sum of its proper divisors (1).

140020061 is an equidigital number, since it uses as much as digits as its factorization.

140020061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 140020061 is about 11833.0072678081. The cubic root of 140020061 is about 519.2742105778.

The spelling of 140020061 in words is "one hundred forty million, twenty thousand, sixty-one".