140171917 has 2 divisors, whose sum is σ = 140171918. Its totient is φ = 140171916.

The previous prime is 140171891. The next prime is 140171921. The reversal of 140171917 is 719171041.

140171917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136095556 + 4076361 = 11666^2 + 2019^2 .

It is an emirp because it is prime and its reverse (719171041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140171917 - 2⁷ = 140171789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140171117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70085958 + 70085959.

It is an arithmetic number, because the mean of its divisors is an integer number (70085959).

Almost surely, 2^140171917 is an apocalyptic number.

It is an amenable number.

140171917 is a deficient number, since it is larger than the sum of its proper divisors (1).

140171917 is an equidigital number, since it uses as much as digits as its factorization.

140171917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 31.

The square root of 140171917 is about 11839.4221565075. The cubic root of 140171917 is about 519.4618656282.

The spelling of 140171917 in words is "one hundred forty million, one hundred seventy-one thousand, nine hundred seventeen".