140171807 has 2 divisors, whose sum is σ = 140171808. Its totient is φ = 140171806.

The previous prime is 140171791. The next prime is 140171809. The reversal of 140171807 is 708171041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140171807 - 2⁴ = 140171791 is a prime.

Together with 140171809, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140171807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140171809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70085903 + 70085904.

It is an arithmetic number, because the mean of its divisors is an integer number (70085904).

Almost surely, 2^140171807 is an apocalyptic number.

140171807 is a deficient number, since it is larger than the sum of its proper divisors (1).

140171807 is an equidigital number, since it uses as much as digits as its factorization.

140171807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 140171807 is about 11839.4175110096. The cubic root of 140171807 is about 519.4617297455.

The spelling of 140171807 in words is "one hundred forty million, one hundred seventy-one thousand, eight hundred seven".