140171869 has 2 divisors, whose sum is σ = 140171870. Its totient is φ = 140171868.

The previous prime is 140171809. The next prime is 140171891. The reversal of 140171869 is 968171041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103266244 + 36905625 = 10162^2 + 6075^2 .

It is a cyclic number.

It is not a de Polignac number, because 140171869 - 2⁷ = 140171741 is a prime.

It is a super-2 number, since 2×140171869² = 39296305717906322, which contains 22 as substring.

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, 70085934 + 70085935.

It is an arithmetic number, because the mean of its divisors is an integer number (70085935).

Almost surely, 2^140171869 is an apocalyptic number.

It is an amenable number.

140171869 is a deficient number, since it is larger than the sum of its proper divisors (1).

140171869 is an equidigital number, since it uses as much as digits as its factorization.

140171869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 140171869 is about 11839.4201293813. The cubic root of 140171869 is about 519.4618063340.

The spelling of 140171869 in words is "one hundred forty million, one hundred seventy-one thousand, eight hundred sixty-nine".