140720171 has 2 divisors, whose sum is σ = 140720172. Its totient is φ = 140720170.

The previous prime is 140720119. The next prime is 140720179. The reversal of 140720171 is 171027041.

It is a strong prime.

It is an emirp because it is prime and its reverse (171027041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140720171 - 2¹⁰ = 140719147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140720179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70360085 + 70360086.

It is an arithmetic number, because the mean of its divisors is an integer number (70360086).

Almost surely, 2^140720171 is an apocalyptic number.

140720171 is a deficient number, since it is larger than the sum of its proper divisors (1).

140720171 is an equidigital number, since it uses as much as digits as its factorization.

140720171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 140720171 is about 11862.5533086263. The cubic root of 140720171 is about 520.1382411055.

The spelling of 140720171 in words is "one hundred forty million, seven hundred twenty thousand, one hundred seventy-one".