140168437 has 2 divisors, whose sum is σ = 140168438. Its totient is φ = 140168436.

The previous prime is 140168419. The next prime is 140168443. The reversal of 140168437 is 734861041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136749636 + 3418801 = 11694^2 + 1849^2 .

It is an emirp because it is prime and its reverse (734861041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140168437 - 2⁷ = 140168309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140165437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70084218 + 70084219.

It is an arithmetic number, because the mean of its divisors is an integer number (70084219).

Almost surely, 2^140168437 is an apocalyptic number.

It is an amenable number.

140168437 is a deficient number, since it is larger than the sum of its proper divisors (1).

140168437 is an equidigital number, since it uses as much as digits as its factorization.

140168437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 140168437 is about 11839.2751889632. The cubic root of 140168437 is about 519.4575667589.

The spelling of 140168437 in words is "one hundred forty million, one hundred sixty-eight thousand, four hundred thirty-seven".