140655217 has 2 divisors, whose sum is σ = 140655218. Its totient is φ = 140655216.

The previous prime is 140655211. The next prime is 140655223. The reversal of 140655217 is 712556041.

It is a balanced prime because it is at equal distance from previous prime (140655211) and next prime (140655223).

It can be written as a sum of positive squares in only one way, i.e., 139806976 + 848241 = 11824^2 + 921^2 .

It is a cyclic number.

It is not a de Polignac number, because 140655217 - 2⁷ = 140655089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140655211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70327608 + 70327609.

It is an arithmetic number, because the mean of its divisors is an integer number (70327609).

Almost surely, 2^140655217 is an apocalyptic number.

It is an amenable number.

140655217 is a deficient number, since it is larger than the sum of its proper divisors (1).

140655217 is an equidigital number, since it uses as much as digits as its factorization.

140655217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 140655217 is about 11859.8152177848. The cubic root of 140655217 is about 520.0581998468.

The spelling of 140655217 in words is "one hundred forty million, six hundred fifty-five thousand, two hundred seventeen".