2931812393 has 2 divisors, whose sum is σ = 2931812394. Its totient is φ = 2931812392.

The previous prime is 2931812339. The next prime is 2931812447. The reversal of 2931812393 is 3932181392.

It is a happy number.

Together with previous prime (2931812339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (2931812339) and next prime (2931812447).

It can be written as a sum of positive squares in only one way, i.e., 2629330729 + 302481664 = 51277^2 + 17392^2 .

It is a cyclic number.

It is not a de Polignac number, because 2931812393 - 2¹⁴ = 2931796009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2931812393.

It is not a weakly prime, because it can be changed into another prime (2931812593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1465906196 + 1465906197.

It is an arithmetic number, because the mean of its divisors is an integer number (1465906197).

Almost surely, 2^2931812393 is an apocalyptic number.

It is an amenable number.

2931812393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2931812393 is an equidigital number, since it uses as much as digits as its factorization.

2931812393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 2931812393 is about 54146.2130993480. The cubic root of 2931812393 is about 1431.2386602510.

The spelling of 2931812393 in words is "two billion, nine hundred thirty-one million, eight hundred twelve thousand, three hundred ninety-three".