140168461 has 2 divisors, whose sum is σ = 140168462. Its totient is φ = 140168460.

The previous prime is 140168443. The next prime is 140168471. The reversal of 140168461 is 164861041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75864100 + 64304361 = 8710^2 + 8019^2 .

It is a cyclic number.

It is not a de Polignac number, because 140168461 - 2¹⁵ = 140135693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140168471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70084230 + 70084231.

It is an arithmetic number, because the mean of its divisors is an integer number (70084231).

Almost surely, 2^140168461 is an apocalyptic number.

It is an amenable number.

140168461 is a deficient number, since it is larger than the sum of its proper divisors (1).

140168461 is an equidigital number, since it uses as much as digits as its factorization.

140168461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 140168461 is about 11839.2762025387. The cubic root of 140168461 is about 519.4575964065.

The spelling of 140168461 in words is "one hundred forty million, one hundred sixty-eight thousand, four hundred sixty-one".