140213813 has 2 divisors, whose sum is σ = 140213814. Its totient is φ = 140213812.

The previous prime is 140213783. The next prime is 140213833. The reversal of 140213813 is 318312041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104489284 + 35724529 = 10222^2 + 5977^2 .

It is a cyclic number.

It is not a de Polignac number, because 140213813 - 2¹⁰ = 140212789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140213833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70106906 + 70106907.

It is an arithmetic number, because the mean of its divisors is an integer number (70106907).

Almost surely, 2^140213813 is an apocalyptic number.

It is an amenable number.

140213813 is a deficient number, since it is larger than the sum of its proper divisors (1).

140213813 is an equidigital number, since it uses as much as digits as its factorization.

140213813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 140213813 is about 11841.1913674258. The cubic root of 140213813 is about 519.5136144779.

Adding to 140213813 its reverse (318312041), we get a palindrome (458525854).

The spelling of 140213813 in words is "one hundred forty million, two hundred thirteen thousand, eight hundred thirteen".